diff options
Diffstat (limited to 'svm')
| -rw-r--r-- | svm/persist.c | 336 | ||||
| -rw-r--r-- | svm/ssvm.c | 183 | ||||
| -rw-r--r-- | svm/ssvm.h | 57 | ||||
| -rw-r--r-- | svm/svm.c | 1892 | ||||
| -rw-r--r-- | svm/svm.h | 238 | ||||
| -rw-r--r-- | svm/svm_test.c | 39 | ||||
| -rw-r--r-- | svm/svmdb.c | 798 | ||||
| -rw-r--r-- | svm/svmdb.h | 134 | ||||
| -rw-r--r-- | svm/svmdbtool.c | 464 | ||||
| -rw-r--r-- | svm/svmtool.c | 722 |
10 files changed, 2616 insertions, 2247 deletions
diff --git a/svm/persist.c b/svm/persist.c index 591072dfd59..023c596b9cf 100644 --- a/svm/persist.c +++ b/svm/persist.c @@ -1,4 +1,4 @@ -/* +/* *------------------------------------------------------------------ * persist.c - persistent data structure storage test / demo code * @@ -42,195 +42,217 @@ #include <vppinfra/serialize.h> #include <svmdb.h> -typedef struct { - svmdb_client_t *c; +typedef struct +{ + svmdb_client_t *c; } persist_main_t; persist_main_t persist_main; -typedef struct { - u8 * string1; - u8 * string2; +typedef struct +{ + u8 *string1; + u8 *string2; } demo_struct2_t; -typedef struct { - demo_struct2_t * demo2; - u8 * name; +typedef struct +{ + demo_struct2_t *demo2; + u8 *name; } demo_struct1_t; -/* +/* * Data structures in persistent shared memory, all the time */ -clib_error_t * persist_malloc (persist_main_t * pm) +clib_error_t * +persist_malloc (persist_main_t * pm) { - demo_struct2_t *demo2; - demo_struct1_t *demo1; - time_t starttime = time(0); - char *datestring = ctime(&starttime); - void *oldheap; - - /* Get back the root pointer */ - demo1 = svmdb_local_get_variable_reference - (pm->c, SVMDB_NAMESPACE_VEC, "demo1_location"); - - /* It doesnt exist create our data structures */ - if (demo1 == 0) { - /* If you want MP / thread safety, lock the region... */ - pthread_mutex_lock(&pm->c->db_rp->mutex); - - /* Switch to the shared memory region heap */ - oldheap = svm_push_data_heap (pm->c->db_rp); - - /* Allocate the top-level structure as a single element vector */ - vec_validate (demo1, 0); - - /* Allocate the next-level structure as a plain old memory obj */ - demo2 = clib_mem_alloc (sizeof (*demo2)); - - demo1->demo2 = demo2; - demo1->name = format (0, "My name is Ishmael%c", 0); - demo2->string1 = format (0, "Here is string1%c", 0); - demo2->string2 = format (0, "Born at %s%c", datestring, 0); - - /* Back to the process-private heap */ - svm_pop_heap(oldheap); - pthread_mutex_unlock(&pm->c->db_rp->mutex); - - /* - * Set the root pointer. Note: this guy switches heaps, locks, etc. - * We allocated demo1 as a vector to make this "just work..." - */ - svmdb_local_set_vec_variable (pm->c, "demo1_location", - demo1, sizeof (demo1)); + demo_struct2_t *demo2; + demo_struct1_t *demo1; + time_t starttime = time (0); + char *datestring = ctime (&starttime); + void *oldheap; + + /* Get back the root pointer */ + demo1 = svmdb_local_get_variable_reference + (pm->c, SVMDB_NAMESPACE_VEC, "demo1_location"); + + /* It doesnt exist create our data structures */ + if (demo1 == 0) + { + /* If you want MP / thread safety, lock the region... */ + pthread_mutex_lock (&pm->c->db_rp->mutex); + + /* Switch to the shared memory region heap */ + oldheap = svm_push_data_heap (pm->c->db_rp); + + /* Allocate the top-level structure as a single element vector */ + vec_validate (demo1, 0); + + /* Allocate the next-level structure as a plain old memory obj */ + demo2 = clib_mem_alloc (sizeof (*demo2)); + + demo1->demo2 = demo2; + demo1->name = format (0, "My name is Ishmael%c", 0); + demo2->string1 = format (0, "Here is string1%c", 0); + demo2->string2 = format (0, "Born at %s%c", datestring, 0); + + /* Back to the process-private heap */ + svm_pop_heap (oldheap); + pthread_mutex_unlock (&pm->c->db_rp->mutex); + + /* + * Set the root pointer. Note: this guy switches heaps, locks, etc. + * We allocated demo1 as a vector to make this "just work..." + */ + svmdb_local_set_vec_variable (pm->c, "demo1_location", + demo1, sizeof (demo1)); } - else { - /* retrieve and print data from shared memory */ - demo2 = demo1->demo2; - fformat (stdout, "name: %s\n", demo1->name); - fformat (stdout, "demo2 location: %llx\n", demo2); - fformat (stdout, "string1: %s\n", demo2->string1); - fformat (stdout, "string2: %s\n", demo2->string2); + else + { + /* retrieve and print data from shared memory */ + demo2 = demo1->demo2; + fformat (stdout, "name: %s\n", demo1->name); + fformat (stdout, "demo2 location: %llx\n", demo2); + fformat (stdout, "string1: %s\n", demo2->string1); + fformat (stdout, "string2: %s\n", demo2->string2); } - return 0; + return 0; } -void unserialize_demo1 (serialize_main_t *sm, va_list * args) +void +unserialize_demo1 (serialize_main_t * sm, va_list * args) { - demo_struct1_t ** result = va_arg (*args, demo_struct1_t **); - demo_struct1_t * demo1; - demo_struct2_t * demo2; - - /* Allocate data structures in process private memory */ - demo1 = clib_mem_alloc (sizeof (*demo1)); - demo2 = clib_mem_alloc (sizeof (*demo2)); - demo1->demo2 = demo2; - - /* retrieve data from shared memory checkpoint */ - unserialize_cstring (sm, (char **) &demo1->name); - unserialize_cstring (sm, (char **) &demo2->string1); - unserialize_cstring (sm, (char **) &demo2->string2); - *result = demo1; + demo_struct1_t **result = va_arg (*args, demo_struct1_t **); + demo_struct1_t *demo1; + demo_struct2_t *demo2; + + /* Allocate data structures in process private memory */ + demo1 = clib_mem_alloc (sizeof (*demo1)); + demo2 = clib_mem_alloc (sizeof (*demo2)); + demo1->demo2 = demo2; + + /* retrieve data from shared memory checkpoint */ + unserialize_cstring (sm, (char **) &demo1->name); + unserialize_cstring (sm, (char **) &demo2->string1); + unserialize_cstring (sm, (char **) &demo2->string2); + *result = demo1; } -void serialize_demo1 (serialize_main_t *sm, va_list * args) +void +serialize_demo1 (serialize_main_t * sm, va_list * args) { - demo_struct1_t * demo1 = va_arg (*args, demo_struct1_t *); - demo_struct2_t * demo2 = demo1->demo2; + demo_struct1_t *demo1 = va_arg (*args, demo_struct1_t *); + demo_struct2_t *demo2 = demo1->demo2; - serialize_cstring (sm, (char *)demo1->name); - serialize_cstring (sm, (char *)demo2->string1); - serialize_cstring (sm, (char *)demo2->string2); -} + serialize_cstring (sm, (char *) demo1->name); + serialize_cstring (sm, (char *) demo2->string1); + serialize_cstring (sm, (char *) demo2->string2); +} /* Serialize / unserialize variant */ -clib_error_t * +clib_error_t * persist_serialize (persist_main_t * pm) { - u8 * checkpoint; - serialize_main_t sm; - - demo_struct2_t *demo2; - demo_struct1_t *demo1; - time_t starttime = time(0); - char *datestring = ctime(&starttime); - - /* Get back the root pointer */ - checkpoint = svmdb_local_get_vec_variable (pm->c, "demo1_checkpoint", - sizeof (u8)); - - /* It doesnt exist create our data structures */ - if (checkpoint == 0) { - /* Allocate data structures in process-private memory */ - demo1 = clib_mem_alloc (sizeof (*demo2)); - vec_validate (demo1, 0); - demo2 = clib_mem_alloc (sizeof (*demo2)); - - demo1->demo2 = demo2; - demo1->name = format (0, "My name is Ishmael%c", 0); - demo2->string1 = format (0, "Here is string1%c", 0); - demo2->string2 = format (0, "Born at %s%c", datestring, 0); - - /* Create checkpoint */ - serialize_open_vector (&sm, checkpoint); - serialize (&sm, serialize_demo1, demo1); - checkpoint = serialize_close_vector (&sm); - - /* Copy checkpoint into shared memory */ - svmdb_local_set_vec_variable (pm->c, "demo1_checkpoint", - checkpoint, sizeof (u8)); - /* Toss the process-private-memory original.. */ - vec_free (checkpoint); + u8 *checkpoint; + serialize_main_t sm; + + demo_struct2_t *demo2; + demo_struct1_t *demo1; + time_t starttime = time (0); + char *datestring = ctime (&starttime); + + /* Get back the root pointer */ + checkpoint = svmdb_local_get_vec_variable (pm->c, "demo1_checkpoint", + sizeof (u8)); + + /* It doesnt exist create our data structures */ + if (checkpoint == 0) + { + /* Allocate data structures in process-private memory */ + demo1 = clib_mem_alloc (sizeof (*demo2)); + vec_validate (demo1, 0); + demo2 = clib_mem_alloc (sizeof (*demo2)); + + demo1->demo2 = demo2; + demo1->name = format (0, "My name is Ishmael%c", 0); + demo2->string1 = format (0, "Here is string1%c", 0); + demo2->string2 = format (0, "Born at %s%c", datestring, 0); + + /* Create checkpoint */ + serialize_open_vector (&sm, checkpoint); + serialize (&sm, serialize_demo1, demo1); + checkpoint = serialize_close_vector (&sm); + + /* Copy checkpoint into shared memory */ + svmdb_local_set_vec_variable (pm->c, "demo1_checkpoint", + checkpoint, sizeof (u8)); + /* Toss the process-private-memory original.. */ + vec_free (checkpoint); } - else { - /* Open the checkpoint */ - unserialize_open_data (&sm, checkpoint, vec_len (checkpoint)); - unserialize (&sm, unserialize_demo1, &demo1); - - /* Toss the process-private-memory checkpoint copy */ - vec_free (checkpoint); - - /* Off we go... */ - demo2 = demo1->demo2; - fformat (stdout, "name: %s\n", demo1->name); - fformat (stdout, "demo2 location: %llx\n", demo2); - fformat (stdout, "string1: %s\n", demo2->string1); - fformat (stdout, "string2: %s\n", demo2->string2); + else + { + /* Open the checkpoint */ + unserialize_open_data (&sm, checkpoint, vec_len (checkpoint)); + unserialize (&sm, unserialize_demo1, &demo1); + + /* Toss the process-private-memory checkpoint copy */ + vec_free (checkpoint); + + /* Off we go... */ + demo2 = demo1->demo2; + fformat (stdout, "name: %s\n", demo1->name); + fformat (stdout, "demo2 location: %llx\n", demo2); + fformat (stdout, "string1: %s\n", demo2->string1); + fformat (stdout, "string2: %s\n", demo2->string2); } - return 0; + return 0; } -int main (int argc, char **argv) +int +main (int argc, char **argv) { - unformat_input_t _input, *input=&_input; - persist_main_t * pm = &persist_main; - clib_error_t * error = 0; - - /* Make a 4mb database arena, chroot so it's truly private */ - pm->c = svmdb_map_chroot_size ("/ptest", 4<<20); - - ASSERT(pm->c); - - unformat_init_command_line (input, argv); - - while (unformat_check_input(input) != UNFORMAT_END_OF_INPUT) { - if (unformat (input, "malloc")) - error = persist_malloc (pm); - else if (unformat (input, "serialize")) - error = persist_serialize (pm); - else { - error = clib_error_return (0, "Unknown flavor '%U'", - format_unformat_error, input); - break; - } + unformat_input_t _input, *input = &_input; + persist_main_t *pm = &persist_main; + clib_error_t *error = 0; + + /* Make a 4mb database arena, chroot so it's truly private */ + pm->c = svmdb_map_chroot_size ("/ptest", 4 << 20); + + ASSERT (pm->c); + + unformat_init_command_line (input, argv); + + while (unformat_check_input (input) != UNFORMAT_END_OF_INPUT) + { + if (unformat (input, "malloc")) + error = persist_malloc (pm); + else if (unformat (input, "serialize")) + error = persist_serialize (pm); + else + { + error = clib_error_return (0, "Unknown flavor '%U'", + format_unformat_error, input); + break; + } } - svmdb_unmap (pm->c); + svmdb_unmap (pm->c); - if (error) { - clib_error_report (error); - exit (1); + if (error) + { + clib_error_report (error); + exit (1); } - return 0; + return 0; } + +/* + * fd.io coding-style-patch-verification: ON + * + * Local Variables: + * eval: (c-set-style "gnu") + * End: + */ diff --git a/svm/ssvm.c b/svm/ssvm.c index 92d86e6d1e4..5db14231368 100644 --- a/svm/ssvm.c +++ b/svm/ssvm.c @@ -14,16 +14,17 @@ */ #include "ssvm.h" -int ssvm_master_init (ssvm_private_t * ssvm, u32 master_index) +int +ssvm_master_init (ssvm_private_t * ssvm, u32 master_index) { int ssvm_fd; - u8 * ssvm_filename; + u8 *ssvm_filename; u8 junk = 0; int flags; - ssvm_shared_header_t * sh; - u64 ticks = clib_cpu_time_now(); + ssvm_shared_header_t *sh; + u64 ticks = clib_cpu_time_now (); u64 randomize_baseva; - void * oldheap; + void *oldheap; if (ssvm->ssvm_size == 0) return SSVM_API_ERROR_NO_SIZE; @@ -32,9 +33,9 @@ int ssvm_master_init (ssvm_private_t * ssvm, u32 master_index) unlink ((char *) ssvm_filename); - vec_free(ssvm_filename); + vec_free (ssvm_filename); - ssvm_fd = shm_open((char *) ssvm->name, O_RDWR | O_CREAT | O_EXCL, 0777); + ssvm_fd = shm_open ((char *) ssvm->name, O_RDWR | O_CREAT | O_EXCL, 0777); if (ssvm_fd < 0) { @@ -42,14 +43,14 @@ int ssvm_master_init (ssvm_private_t * ssvm, u32 master_index) return SSVM_API_ERROR_CREATE_FAILURE; } - lseek(ssvm_fd, ssvm->ssvm_size, SEEK_SET); - if (write(ssvm_fd, &junk, 1) != 1) + lseek (ssvm_fd, ssvm->ssvm_size, SEEK_SET); + if (write (ssvm_fd, &junk, 1) != 1) { clib_unix_warning ("set ssvm size"); - close(ssvm_fd); + close (ssvm_fd); return SSVM_API_ERROR_SET_SIZE; } - + flags = MAP_SHARED; if (ssvm->requested_va) flags |= MAP_FIXED; @@ -58,27 +59,29 @@ int ssvm_master_init (ssvm_private_t * ssvm, u32 master_index) if (ssvm->requested_va) ssvm->requested_va += randomize_baseva; - - sh = ssvm->sh = (ssvm_shared_header_t *) mmap((void *)ssvm->requested_va, ssvm->ssvm_size, - PROT_READ | PROT_WRITE, flags, ssvm_fd, 0); + + sh = ssvm->sh = + (ssvm_shared_header_t *) mmap ((void *) ssvm->requested_va, + ssvm->ssvm_size, PROT_READ | PROT_WRITE, + flags, ssvm_fd, 0); if (ssvm->sh == MAP_FAILED) { clib_unix_warning ("mmap"); - close(ssvm_fd); + close (ssvm_fd); return SSVM_API_ERROR_MMAP; } - close(ssvm_fd); + close (ssvm_fd); - ssvm->my_pid = getpid(); + ssvm->my_pid = getpid (); sh->master_pid = ssvm->my_pid; sh->ssvm_size = ssvm->ssvm_size; - sh->heap = mheap_alloc_with_flags - (((u8 *)sh) + MMAP_PAGESIZE, ssvm->ssvm_size - MMAP_PAGESIZE, + sh->heap = mheap_alloc_with_flags + (((u8 *) sh) + MMAP_PAGESIZE, ssvm->ssvm_size - MMAP_PAGESIZE, MHEAP_FLAG_DISABLE_VM | MHEAP_FLAG_THREAD_SAFE); - sh->ssvm_va = pointer_to_uword(sh); + sh->ssvm_va = pointer_to_uword (sh); sh->master_index = master_index; oldheap = ssvm_push_heap (sh); @@ -91,71 +94,79 @@ int ssvm_master_init (ssvm_private_t * ssvm, u32 master_index) return 0; } -int ssvm_slave_init (ssvm_private_t * ssvm, int timeout_in_seconds) +int +ssvm_slave_init (ssvm_private_t * ssvm, int timeout_in_seconds) { - struct stat stat; - int ssvm_fd = -1; - ssvm_shared_header_t * sh; - - ssvm->i_am_master = 0; - - while (timeout_in_seconds-- > 0) - { - if (ssvm_fd < 0) - ssvm_fd = shm_open((char *)ssvm->name, O_RDWR, 0777); - if (ssvm_fd < 0) - { - sleep (1); - continue; - } - if (fstat(ssvm_fd, &stat) < 0) - { - sleep (1); - continue; - } - - if (stat.st_size > 0) - goto map_it; - } - clib_warning ("slave timeout"); - return SSVM_API_ERROR_SLAVE_TIMEOUT; - - map_it: - sh = (void *) mmap (0, MMAP_PAGESIZE, PROT_READ | PROT_WRITE, MAP_SHARED, - ssvm_fd, 0); - if (sh == MAP_FAILED) - { - clib_unix_warning ("slave research mmap"); - close (ssvm_fd); - return SSVM_API_ERROR_MMAP; - } - - while (timeout_in_seconds-- > 0) - { - if (sh->ready) - goto re_map_it; - } - close (ssvm_fd); - munmap (sh, MMAP_PAGESIZE); - clib_warning ("slave timeout 2"); - return SSVM_API_ERROR_SLAVE_TIMEOUT; - - re_map_it: - ssvm->requested_va = (u64) sh->ssvm_va; - ssvm->ssvm_size = sh->ssvm_size; - munmap (sh, MMAP_PAGESIZE); - - sh = ssvm->sh = (void *) mmap((void *)ssvm->requested_va, ssvm->ssvm_size, - PROT_READ | PROT_WRITE, - MAP_SHARED | MAP_FIXED, - ssvm_fd, 0); - - if (sh == MAP_FAILED) - { - clib_unix_warning ("slave final mmap"); - close (ssvm_fd); - return SSVM_API_ERROR_MMAP; - } - sh->slave_pid = getpid(); - return 0; + struct stat stat; + int ssvm_fd = -1; + ssvm_shared_header_t *sh; + + ssvm->i_am_master = 0; + + while (timeout_in_seconds-- > 0) + { + if (ssvm_fd < 0) + ssvm_fd = shm_open ((char *) ssvm->name, O_RDWR, 0777); + if (ssvm_fd < 0) + { + sleep (1); + continue; + } + if (fstat (ssvm_fd, &stat) < 0) + { + sleep (1); + continue; + } + + if (stat.st_size > 0) + goto map_it; + } + clib_warning ("slave timeout"); + return SSVM_API_ERROR_SLAVE_TIMEOUT; + +map_it: + sh = (void *) mmap (0, MMAP_PAGESIZE, PROT_READ | PROT_WRITE, MAP_SHARED, + ssvm_fd, 0); + if (sh == MAP_FAILED) + { + clib_unix_warning ("slave research mmap"); + close (ssvm_fd); + return SSVM_API_ERROR_MMAP; + } + + while (timeout_in_seconds-- > 0) + { + if (sh->ready) + goto re_map_it; + } + close (ssvm_fd); + munmap (sh, MMAP_PAGESIZE); + clib_warning ("slave timeout 2"); + return SSVM_API_ERROR_SLAVE_TIMEOUT; + +re_map_it: + ssvm->requested_va = (u64) sh->ssvm_va; + ssvm->ssvm_size = sh->ssvm_size; + munmap (sh, MMAP_PAGESIZE); + + sh = ssvm->sh = (void *) mmap ((void *) ssvm->requested_va, ssvm->ssvm_size, + PROT_READ | PROT_WRITE, + MAP_SHARED | MAP_FIXED, ssvm_fd, 0); + + if (sh == MAP_FAILED) + { + clib_unix_warning ("slave final mmap"); + close (ssvm_fd); + return SSVM_API_ERROR_MMAP; + } + sh->slave_pid = getpid (); + return 0; } + +/* + * fd.io coding-style-patch-verification: ON + * + * Local Variables: + * eval: (c-set-style "gnu") + * End: + */ diff --git a/svm/ssvm.h b/svm/ssvm.h index cd34afd2928..9e61b9a0827 100644 --- a/svm/ssvm.h +++ b/svm/ssvm.h @@ -41,15 +41,16 @@ #define MMAP_PAGESIZE (4<<10) #define SSVM_N_OPAQUE 7 -typedef struct { +typedef struct +{ /* Spin-lock */ volatile u32 lock; volatile u32 owner_pid; int recursion_count; - u32 tag; /* for debugging */ + u32 tag; /* for debugging */ /* The allocation arena */ - void * heap; + void *heap; /* Segment must be mapped at this address, or no supper */ u64 ssvm_va; @@ -57,8 +58,8 @@ typedef struct { u64 ssvm_size; u32 master_pid; u32 slave_pid; - u8 * name; - void * opaque [SSVM_N_OPAQUE]; + u8 *name; + void *opaque[SSVM_N_OPAQUE]; /* Set when the master application thinks it's time to make the donuts */ volatile u32 ready; @@ -67,55 +68,60 @@ typedef struct { u32 master_index; } ssvm_shared_header_t; -typedef struct { - ssvm_shared_header_t * sh; +typedef struct +{ + ssvm_shared_header_t *sh; u64 ssvm_size; u32 my_pid; u32 vlib_hw_if_index; - u8 * name; + u8 *name; uword requested_va; int i_am_master; u32 per_interface_next_index; - u32 * rx_queue; + u32 *rx_queue; } ssvm_private_t; -always_inline void ssvm_lock (ssvm_shared_header_t * h, u32 my_pid, u32 tag) +always_inline void +ssvm_lock (ssvm_shared_header_t * h, u32 my_pid, u32 tag) { if (h->owner_pid == my_pid) { h->recursion_count++; return; } - + while (__sync_lock_test_and_set (&h->lock, 1)) ; - + h->owner_pid = my_pid; h->recursion_count = 1; h->tag = tag; } -always_inline void ssvm_unlock (ssvm_shared_header_t * h) +always_inline void +ssvm_unlock (ssvm_shared_header_t * h) { if (--h->recursion_count == 0) { h->owner_pid = 0; h->tag = 0; - CLIB_MEMORY_BARRIER(); + CLIB_MEMORY_BARRIER (); h->lock = 0; } } -static inline void *ssvm_push_heap (ssvm_shared_header_t *sh) +static inline void * +ssvm_push_heap (ssvm_shared_header_t * sh) { - u8 *oldheap; - oldheap = clib_mem_set_heap(sh->heap); - return ((void *) oldheap); + u8 *oldheap; + oldheap = clib_mem_set_heap (sh->heap); + return ((void *) oldheap); } -static inline void ssvm_pop_heap (void *oldheap) +static inline void +ssvm_pop_heap (void *oldheap) { - clib_mem_set_heap(oldheap); + clib_mem_set_heap (oldheap); } #define foreach_ssvm_api_error \ @@ -126,7 +132,8 @@ _(SET_SIZE, "Set size failed", -13) \ _(MMAP, "mmap failed", -14) \ _(SLAVE_TIMEOUT, "Slave map timeout", -15) -typedef enum { +typedef enum +{ #define _(n,s,c) SSVM_API_ERROR_##n = c, foreach_ssvm_api_error #undef _ @@ -138,3 +145,11 @@ int ssvm_master_init (ssvm_private_t * ssvm, u32 master_index); int ssvm_slave_init (ssvm_private_t * ssvm, int timeout_in_seconds); #endif /* __included_ssvm_h__ */ + +/* + * fd.io coding-style-patch-verification: ON + * + * Local Variables: + * eval: (c-set-style "gnu") + * End: + */ diff --git a/svm/svm.c b/svm/svm.c index e62f3f839fd..1ee5e95df29 100644 --- a/svm/svm.c +++ b/svm/svm.c @@ -1,6 +1,6 @@ -/* +/* *------------------------------------------------------------------ - * svm.c - shared VM allocation, mmap(...MAP_FIXED...) + * svm.c - shared VM allocation, mmap(...MAP_FIXED...) * library * * Copyright (c) 2009 Cisco and/or its affiliates. @@ -47,777 +47,863 @@ static svm_region_t *root_rp; static int root_rp_refcount; #define MAXLOCK 2 -static pthread_mutex_t *mutexes_held [MAXLOCK]; +static pthread_mutex_t *mutexes_held[MAXLOCK]; static int nheld; -svm_region_t *svm_get_root_rp (void) +svm_region_t * +svm_get_root_rp (void) { - return root_rp; + return root_rp; } #define MUTEX_DEBUG -static void region_lock(svm_region_t *rp, int tag) +static void +region_lock (svm_region_t * rp, int tag) { - pthread_mutex_lock(&rp->mutex); + pthread_mutex_lock (&rp->mutex); #ifdef MUTEX_DEBUG - rp->mutex_owner_pid = getpid(); - rp->mutex_owner_tag = tag; -#endif - ASSERT(nheld < MAXLOCK); - /* - * Keep score of held mutexes so we can try to exit - * cleanly if the world comes to an end at the worst possible - * moment - */ - mutexes_held [nheld++] = &rp->mutex; + rp->mutex_owner_pid = getpid (); + rp->mutex_owner_tag = tag; +#endif + ASSERT (nheld < MAXLOCK); + /* + * Keep score of held mutexes so we can try to exit + * cleanly if the world comes to an end at the worst possible + * moment + */ + mutexes_held[nheld++] = &rp->mutex; } -static void region_unlock(svm_region_t *rp) +static void +region_unlock (svm_region_t * rp) { - int i,j; + int i, j; #ifdef MUTEX_DEBUG - rp->mutex_owner_pid = 0; - rp->mutex_owner_tag = 0; -#endif - - for (i = nheld-1; i >= 0; i--) { - if (mutexes_held[i] == &rp->mutex) { - for (j = i; j < MAXLOCK-1; j++) - mutexes_held[j] = mutexes_held[j+1]; - nheld--; - goto found; - } + rp->mutex_owner_pid = 0; + rp->mutex_owner_tag = 0; +#endif + + for (i = nheld - 1; i >= 0; i--) + { + if (mutexes_held[i] == &rp->mutex) + { + for (j = i; j < MAXLOCK - 1; j++) + mutexes_held[j] = mutexes_held[j + 1]; + nheld--; + goto found; + } } - ASSERT(0); + ASSERT (0); found: - CLIB_MEMORY_BARRIER(); - pthread_mutex_unlock(&rp->mutex); + CLIB_MEMORY_BARRIER (); + pthread_mutex_unlock (&rp->mutex); } -static u8 * format_svm_flags (u8 * s, va_list * args) +static u8 * +format_svm_flags (u8 * s, va_list * args) { - uword f = va_arg (*args, uword); - - if (f & SVM_FLAGS_MHEAP) - s = format (s, "MHEAP "); - if (f & SVM_FLAGS_FILE) - s = format (s, "FILE "); - if (f & SVM_FLAGS_NODATA) - s = format (s, "NODATA "); - if (f & SVM_FLAGS_NEED_DATA_INIT) - s = format (s, "INIT "); - - return (s); + uword f = va_arg (*args, uword); + + if (f & SVM_FLAGS_MHEAP) + s = format (s, "MHEAP "); + if (f & SVM_FLAGS_FILE) + s = format (s, "FILE "); + if (f & SVM_FLAGS_NODATA) + s = format (s, "NODATA "); + if (f & SVM_FLAGS_NEED_DATA_INIT) + s = format (s, "INIT "); + + return (s); } -static u8 * format_svm_size (u8 * s, va_list * args) +static u8 * +format_svm_size (u8 * s, va_list * args) { - uword size = va_arg (*args, uword); - - if (size >= (1<<20)) { - s = format (s, "(%d mb)", size >> 20); - } else if (size >= (1<<10)) { - s = format (s, "(%d kb)", size >> 10); - } else { - s = format (s, "(%d bytes)", size); + uword size = va_arg (*args, uword); + + if (size >= (1 << 20)) + { + s = format (s, "(%d mb)", size >> 20); + } + else if (size >= (1 << 10)) + { + s = format (s, "(%d kb)", size >> 10); } - return (s); + else + { + s = format (s, "(%d bytes)", size); + } + return (s); } -u8 * format_svm_region (u8 * s, va_list * args) +u8 * +format_svm_region (u8 * s, va_list * args) { - svm_region_t *rp = va_arg (*args, svm_region_t *); - int verbose = va_arg (*args, int); - int i; - uword lo, hi; - - s = format (s, "%s: base va 0x%x size 0x%x %U\n", - rp->region_name, rp->virtual_base, - rp->virtual_size, format_svm_size, rp->virtual_size); - s = format (s, " user_ctx 0x%x, bitmap_size %d\n", - rp->user_ctx, rp->bitmap_size); - - if (verbose) { - s = format (s, " flags: 0x%x %U\n", rp->flags, - format_svm_flags, rp->flags); - s = format (s, - " region_heap 0x%x data_base 0x%x data_heap 0x%x\n", - rp->region_heap, rp->data_base, rp->data_heap); + svm_region_t *rp = va_arg (*args, svm_region_t *); + int verbose = va_arg (*args, int); + int i; + uword lo, hi; + + s = format (s, "%s: base va 0x%x size 0x%x %U\n", + rp->region_name, rp->virtual_base, + rp->virtual_size, format_svm_size, rp->virtual_size); + s = format (s, " user_ctx 0x%x, bitmap_size %d\n", + rp->user_ctx, rp->bitmap_size); + + if (verbose) + { + s = format (s, " flags: 0x%x %U\n", rp->flags, + format_svm_flags, rp->flags); + s = format (s, + " region_heap 0x%x data_base 0x%x data_heap 0x%x\n", + rp->region_heap, rp->data_base, rp->data_heap); } - s = format (s, " %d clients, pids: ", - vec_len(rp->client_pids)); - - for (i = 0; i < vec_len(rp->client_pids); i++) - s = format (s, "%d ", rp->client_pids[i]); - - s = format (s, "\n"); - - if (verbose) { - lo = hi = ~0; - - s = format (s, " VM in use: "); - - for (i = 0; i < rp->bitmap_size; i++) { - if (clib_bitmap_get_no_check (rp->bitmap, i) != 0) { - if (lo == ~0) { - hi = lo = rp->virtual_base + i*MMAP_PAGESIZE; - } else { - hi = rp->virtual_base + i*MMAP_PAGESIZE; - } - } else { - if (lo != ~0) { - hi = rp->virtual_base + i*MMAP_PAGESIZE -1; - s = format (s, " 0x%x - 0x%x (%dk)\n", lo, hi, - (hi - lo)>>10); - lo = hi = ~0; - } - } - } - s = format (s, " rgn heap stats: %U", format_mheap, - rp->region_heap, 0); - if ((rp->flags & SVM_FLAGS_MHEAP) && rp->data_heap) { - s = format (s, "\n data heap stats: %U", format_mheap, - rp->data_heap, 1); - } - s = format (s, "\n"); + s = format (s, " %d clients, pids: ", vec_len (rp->client_pids)); + + for (i = 0; i < vec_len (rp->client_pids); i++) + s = format (s, "%d ", rp->client_pids[i]); + + s = format (s, "\n"); + + if (verbose) + { + lo = hi = ~0; + + s = format (s, " VM in use: "); + + for (i = 0; i < rp->bitmap_size; i++) + { + if (clib_bitmap_get_no_check (rp->bitmap, i) != 0) + { + if (lo == ~0) + { + hi = lo = rp->virtual_base + i * MMAP_PAGESIZE; + } + else + { + hi = rp->virtual_base + i * MMAP_PAGESIZE; + } + } + else + { + if (lo != ~0) + { + hi = rp->virtual_base + i * MMAP_PAGESIZE - 1; + s = format (s, " 0x%x - 0x%x (%dk)\n", lo, hi, + (hi - lo) >> 10); + lo = hi = ~0; + } + } + } + s = format (s, " rgn heap stats: %U", format_mheap, + rp->region_heap, 0); + if ((rp->flags & SVM_FLAGS_MHEAP) && rp->data_heap) + { + s = format (s, "\n data heap stats: %U", format_mheap, + rp->data_heap, 1); + } + s = format (s, "\n"); } - return(s); + return (s); } /* * rnd_pagesize * Round to a pagesize multiple, presumably 4k works */ -static unsigned int rnd_pagesize(unsigned int size) +static unsigned int +rnd_pagesize (unsigned int size) { - unsigned int rv; + unsigned int rv; - rv = (size + (MMAP_PAGESIZE-1)) & ~(MMAP_PAGESIZE-1); - return(rv); + rv = (size + (MMAP_PAGESIZE - 1)) & ~(MMAP_PAGESIZE - 1); + return (rv); } -/* +/* * svm_data_region_setup */ -static int svm_data_region_create (svm_map_region_args_t *a, - svm_region_t *rp) +static int +svm_data_region_create (svm_map_region_args_t * a, svm_region_t * rp) { - int fd; - u8 junk = 0; - uword map_size; - - map_size = rp->virtual_size - (MMAP_PAGESIZE + SVM_PVT_MHEAP_SIZE); - - if (a->flags & SVM_FLAGS_FILE) { - struct stat statb; - - fd = open (a->backing_file, O_RDWR | O_CREAT, 0777); - - if (fd < 0) { - clib_unix_warning ("open"); - return -1; - } - - if (fstat(fd, &statb) < 0) { - clib_unix_warning("fstat"); - close (fd); - return -2; - } - - if (statb.st_mode & S_IFREG) { - if (statb.st_size == 0) { - if (lseek(fd, map_size, SEEK_SET) == (off_t) -1) { - clib_unix_warning ("seek region size"); - close (fd); - return -3; - } - if (write(fd, &junk, 1) != 1) { - clib_unix_warning ("set region size"); - close (fd); - return -3; - } - } else { - map_size = rnd_pagesize (statb.st_size); - } - } else { - map_size = a->backing_mmap_size; - } - - ASSERT(map_size <= rp->virtual_size - - (MMAP_PAGESIZE + SVM_PVT_MHEAP_SIZE)); - - if (mmap (rp->data_base, map_size, PROT_READ | PROT_WRITE, - MAP_SHARED | MAP_FIXED, fd, 0) == MAP_FAILED) { - clib_unix_warning("mmap"); - close (fd); - return -3; - } - close(fd); - rp->backing_file = (char *) format(0, "%s\0", a->backing_file); - rp->flags |= SVM_FLAGS_FILE; + int fd; + u8 junk = 0; + uword map_size; + + map_size = rp->virtual_size - (MMAP_PAGESIZE + SVM_PVT_MHEAP_SIZE); + + if (a->flags & SVM_FLAGS_FILE) + { + struct stat statb; + + fd = open (a->backing_file, O_RDWR | O_CREAT, 0777); + + if (fd < 0) + { + clib_unix_warning ("open"); + return -1; + } + + if (fstat (fd, &statb) < 0) + { + clib_unix_warning ("fstat"); + close (fd); + return -2; + } + + if (statb.st_mode & S_IFREG) + { + if (statb.st_size == 0) + { + if (lseek (fd, map_size, SEEK_SET) == (off_t) - 1) + { + clib_unix_warning ("seek region size"); + close (fd); + return -3; + } + if (write (fd, &junk, 1) != 1) + { + clib_unix_warning ("set region size"); + close (fd); + return -3; + } + } + else + { + map_size = rnd_pagesize (statb.st_size); + } + } + else + { + map_size = a->backing_mmap_size; + } + + ASSERT (map_size <= rp->virtual_size - + (MMAP_PAGESIZE + SVM_PVT_MHEAP_SIZE)); + + if (mmap (rp->data_base, map_size, PROT_READ | PROT_WRITE, + MAP_SHARED | MAP_FIXED, fd, 0) == MAP_FAILED) + { + clib_unix_warning ("mmap"); + close (fd); + return -3; + } + close (fd); + rp->backing_file = (char *) format (0, "%s\0", a->backing_file); + rp->flags |= SVM_FLAGS_FILE; } - - if (a->flags & SVM_FLAGS_MHEAP) { - rp->data_heap = - mheap_alloc_with_flags ((void *)(rp->data_base), map_size, - MHEAP_FLAG_DISABLE_VM); - rp->flags |= SVM_FLAGS_MHEAP; + + if (a->flags & SVM_FLAGS_MHEAP) + { + rp->data_heap = + mheap_alloc_with_flags ((void *) (rp->data_base), map_size, + MHEAP_FLAG_DISABLE_VM); + rp->flags |= SVM_FLAGS_MHEAP; } - return 0; + return 0; } -static int svm_data_region_map (svm_map_region_args_t *a, - svm_region_t *rp) +static int +svm_data_region_map (svm_map_region_args_t * a, svm_region_t * rp) { - int fd; - u8 junk = 0; - uword map_size; - struct stat statb; - - map_size = rp->virtual_size - (MMAP_PAGESIZE + SVM_PVT_MHEAP_SIZE); - - if (a->flags & SVM_FLAGS_FILE) { - - fd = open (a->backing_file, O_RDWR, 0777); - - if (fd < 0) { - clib_unix_warning ("open"); - return -1; - } - - if (fstat(fd, &statb) < 0) { - clib_unix_warning("fstat"); - close (fd); - return -2; - } - - if (statb.st_mode & S_IFREG) { - if (statb.st_size == 0) { - if (lseek(fd, map_size, SEEK_SET) == (off_t) -1) { - clib_unix_warning ("seek region size"); - close (fd); - return -3; - } - if (write(fd, &junk, 1) != 1) { - clib_unix_warning ("set region size"); - close (fd); - return -3; - } - } else { - map_size = rnd_pagesize (statb.st_size); - } - } else { - map_size = a->backing_mmap_size; - } - - ASSERT(map_size <= rp->virtual_size - - (MMAP_PAGESIZE + SVM_PVT_MHEAP_SIZE)); - - if (mmap (rp->data_base, map_size, PROT_READ | PROT_WRITE, - MAP_SHARED | MAP_FIXED, fd, 0) == MAP_FAILED) { - clib_unix_warning("mmap"); - close (fd); - return -3; - } - close(fd); + int fd; + u8 junk = 0; + uword map_size; + struct stat statb; + + map_size = rp->virtual_size - (MMAP_PAGESIZE + SVM_PVT_MHEAP_SIZE); + + if (a->flags & SVM_FLAGS_FILE) + { + + fd = open (a->backing_file, O_RDWR, 0777); + + if (fd < 0) + { + clib_unix_warning ("open"); + return -1; + } + + if (fstat (fd, &statb) < 0) + { + clib_unix_warning ("fstat"); + close (fd); + return -2; + } + + if (statb.st_mode & S_IFREG) + { + if (statb.st_size == 0) + { + if (lseek (fd, map_size, SEEK_SET) == (off_t) - 1) + { + clib_unix_warning ("seek region size"); + close (fd); + return -3; + } + if (write (fd, &junk, 1) != 1) + { + clib_unix_warning ("set region size"); + close (fd); + return -3; + } + } + else + { + map_size = rnd_pagesize (statb.st_size); + } + } + else + { + map_size = a->backing_mmap_size; + } + + ASSERT (map_size <= rp->virtual_size + - (MMAP_PAGESIZE + SVM_PVT_MHEAP_SIZE)); + + if (mmap (rp->data_base, map_size, PROT_READ | PROT_WRITE, + MAP_SHARED | MAP_FIXED, fd, 0) == MAP_FAILED) + { + clib_unix_warning ("mmap"); + close (fd); + return -3; + } + close (fd); } - return 0; + return 0; } -u8 *shm_name_from_svm_map_region_args (svm_map_region_args_t *a) +u8 * +shm_name_from_svm_map_region_args (svm_map_region_args_t * a) { - u8 *path; - u8 *shm_name; - u8 *split_point; - u8 *mkdir_arg = 0; - int root_path_offset = 0; - int name_offset = 0; - - if (a->root_path) { - /* Tolerate present or absent slashes */ - if (a->root_path[0] == '/') - root_path_offset++; - - /* create the root_path under /dev/shm - iterate through path creating directories */ - - path = format (0, "/dev/shm/%s%c", &a->root_path[root_path_offset], 0); - split_point = path+1; - vec_add1(mkdir_arg, '-'); - - while (*split_point) { - while (*split_point && *split_point != '/') { - vec_add1 (mkdir_arg, *split_point); - split_point++; - } - vec_add1 (mkdir_arg, 0); - - /* ready to descend another level */ - mkdir_arg[vec_len(mkdir_arg)-1] = '-'; - split_point++; - } - vec_free(mkdir_arg); - vec_free(path); - - if (a->name[0] == '/') - name_offset = 1; - - shm_name = format (0, "/%s-%s%c", a->root_path, - &a->name[name_offset], 0); + u8 *path; + u8 *shm_name; + u8 *split_point; + u8 *mkdir_arg = 0; + int root_path_offset = 0; + int name_offset = 0; + + if (a->root_path) + { + /* Tolerate present or absent slashes */ + if (a->root_path[0] == '/') + root_path_offset++; + + /* create the root_path under /dev/shm + iterate through path creating directories */ + + path = format (0, "/dev/shm/%s%c", &a->root_path[root_path_offset], 0); + split_point = path + 1; + vec_add1 (mkdir_arg, '-'); + + while (*split_point) + { + while (*split_point && *split_point != '/') + { + vec_add1 (mkdir_arg, *split_point); + split_point++; + } + vec_add1 (mkdir_arg, 0); + + /* ready to descend another level */ + mkdir_arg[vec_len (mkdir_arg) - 1] = '-'; + split_point++; + } + vec_free (mkdir_arg); + vec_free (path); + + if (a->name[0] == '/') + name_offset = 1; + + shm_name = format (0, "/%s-%s%c", a->root_path, + &a->name[name_offset], 0); } - else - shm_name = format (0, "%s%c", a->name, 0); - return (shm_name); + else + shm_name = format (0, "%s%c", a->name, 0); + return (shm_name); } /* * svm_map_region */ -void *svm_map_region (svm_map_region_args_t *a) +void * +svm_map_region (svm_map_region_args_t * a) { - int svm_fd; - svm_region_t *rp; - pthread_mutexattr_t attr; - pthread_condattr_t cattr; - int deadman=0; - u8 junk = 0; - void *oldheap; - int overhead_space; - int rv; - uword data_base; - int nbits, words, bit; - int pid_holding_region_lock; - u8 *shm_name; - int dead_region_recovery = 0; - int time_left; - struct stat stat; - struct timespec ts, tsrem; - - if (CLIB_DEBUG > 1) - clib_warning ("[%d] map region %s", getpid(), a->name); - - ASSERT((a->size & ~(MMAP_PAGESIZE-1)) == a->size); - ASSERT(a->name); - - shm_name = shm_name_from_svm_map_region_args (a); - - svm_fd = shm_open((char *) shm_name, O_RDWR | O_CREAT | O_EXCL, 0777); - - if (svm_fd >= 0) { - if (fchmod (svm_fd, 0770) < 0) - clib_unix_warning ("segment chmod"); - /* This turns out to fail harmlessly if the client starts first */ - if (fchown (svm_fd, a->uid, a->gid) < 0) - clib_unix_warning ("segment chown [ok if client starts first]"); - - vec_free(shm_name); - - if (lseek(svm_fd, a->size, SEEK_SET) == (off_t) -1) { - clib_warning ("seek region size"); - close (svm_fd); - return (0); - } - if (write(svm_fd, &junk, 1) != 1) { - clib_warning ("set region size"); - close (svm_fd); - return (0); - } - - rp = mmap((void *)a->baseva, a->size, - PROT_READ | PROT_WRITE, MAP_SHARED | MAP_FIXED, svm_fd, 0); - - if (rp == (svm_region_t *) MAP_FAILED) { - clib_unix_warning ("mmap create"); - close (svm_fd); - return (0); - } - close(svm_fd); - memset(rp, 0, sizeof(*rp)); - - if (pthread_mutexattr_init(&attr)) - clib_unix_warning("mutexattr_init"); - - if (pthread_mutexattr_setpshared(&attr, PTHREAD_PROCESS_SHARED)) - clib_unix_warning("mutexattr_setpshared"); - - if (pthread_mutex_init(&rp->mutex, &attr)) - clib_unix_warning("mutex_init"); - - if (pthread_mutexattr_destroy(&attr)) - clib_unix_warning("mutexattr_destroy"); - - if (pthread_condattr_init(&cattr)) - clib_unix_warning("condattr_init"); - - if (pthread_condattr_setpshared(&cattr, PTHREAD_PROCESS_SHARED)) - clib_unix_warning("condattr_setpshared"); - - if (pthread_cond_init(&rp->condvar, &cattr)) - clib_unix_warning("cond_init"); - - if(pthread_condattr_destroy(&cattr)) - clib_unix_warning("condattr_destroy"); - - region_lock (rp, 1); - - rp->virtual_base = a->baseva; - rp->virtual_size = a->size; - - rp->region_heap = - mheap_alloc_with_flags ((void *)(a->baseva+MMAP_PAGESIZE), - SVM_PVT_MHEAP_SIZE, - MHEAP_FLAG_DISABLE_VM); - oldheap = svm_push_pvt_heap(rp); - - rp->region_name = (char *)format (0, "%s%c", a->name, 0); - vec_add1(rp->client_pids, getpid()); - - nbits = rp->virtual_size / MMAP_PAGESIZE; - - ASSERT (nbits > 0); - rp->bitmap_size = nbits; - words = (nbits + BITS(uword)-1) / BITS(uword); - vec_validate (rp->bitmap, words-1); - - overhead_space = MMAP_PAGESIZE /* header */ + - SVM_PVT_MHEAP_SIZE; - - bit = 0; - data_base = (uword)rp->virtual_base; - - if (a->flags & SVM_FLAGS_NODATA) - rp->flags |= SVM_FLAGS_NEED_DATA_INIT; - - do { - clib_bitmap_set_no_check (rp->bitmap, bit, 1); - bit++; - overhead_space -= MMAP_PAGESIZE; - data_base += MMAP_PAGESIZE; - } while (overhead_space > 0); - - rp->data_base = (void *)data_base; - - /* - * Note: although the POSIX spec guarantees that only one - * process enters this block, we have to play games - * to hold off clients until e.g. the mutex is ready - */ - rp->version = SVM_VERSION; - - /* setup the data portion of the region */ - - rv = svm_data_region_create (a, rp); - if (rv) { - clib_warning ("data_region_create: %d", rv); - } - - region_unlock(rp); - - svm_pop_heap(oldheap); - - return ((void *) rp); - } else { - svm_fd = shm_open((char *)shm_name, O_RDWR, 0777); - - vec_free(shm_name); - - if (svm_fd < 0) { - perror("svm_region_map(mmap open)"); - return (0); - } - - time_left = 20; - while (1) { - if (0 != fstat(svm_fd, &stat)) { - clib_warning("fstat failed: %d", errno); - close (svm_fd); - return (0); - } - if (stat.st_size > 0) { - break; - } - if (0 == time_left) { - clib_warning("waiting for resize of shm file timed out"); - close (svm_fd); - return (0); - } - ts.tv_sec = 0; - ts.tv_nsec = 100000000; - while (nanosleep(&ts, &tsrem) < 0) - ts = tsrem; - time_left--; - } - - rp = mmap(0, MMAP_PAGESIZE, - PROT_READ | PROT_WRITE, MAP_SHARED, svm_fd, 0); - - if (rp == (svm_region_t *) MAP_FAILED) { - close(svm_fd); - clib_warning("mmap"); - return (0); - } - /* - * We lost the footrace to create this region; make sure - * the winner has crossed the finish line. - */ - while (rp->version == 0 && deadman++ < 5) { - sleep(1); - } - - /* - * <bleep>-ed? - */ - if (rp->version == 0) { - clib_warning("rp->version %d not %d", rp->version, - SVM_VERSION); - close(svm_fd); - munmap(rp, a->size); - return (0); - } - /* Remap now that the region has been placed */ - a->baseva = rp->virtual_base; - a->size = rp->virtual_size; - munmap(rp, MMAP_PAGESIZE); - - rp = (void *) mmap ((void *)a->baseva, a->size, - PROT_READ | PROT_WRITE, - MAP_SHARED | MAP_FIXED, svm_fd, 0); - if ((uword)rp == (uword)MAP_FAILED) { - clib_unix_warning ("mmap"); - close (svm_fd); - return (0); - } - - if ((uword) rp != rp->virtual_base) { - clib_warning("mmap botch"); - } - - /* - * Try to fix the region mutex if it is held by - * a dead process - */ - pid_holding_region_lock = rp->mutex_owner_pid; - if (pid_holding_region_lock && - kill (pid_holding_region_lock, 0) < 0) { - clib_warning ( - "region %s mutex held by dead pid %d, tag %d, force unlock", - rp->region_name, pid_holding_region_lock, rp->mutex_owner_tag); - /* owner pid is nonexistent */ - rp->mutex.__data.__owner = 0; - rp->mutex.__data.__lock = 0; - dead_region_recovery = 1; - } - - if (dead_region_recovery) - clib_warning ("recovery: attempt to re-lock region"); - - region_lock(rp, 2); - oldheap = svm_push_pvt_heap (rp); - vec_add1(rp->client_pids, getpid()); - - if (dead_region_recovery) - clib_warning ("recovery: attempt svm_data_region_map"); - - rv = svm_data_region_map (a, rp); - if (rv) { - clib_warning ("data_region_map: %d", rv); - } - - if (dead_region_recovery) - clib_warning ("unlock and continue"); - - region_unlock(rp); - - svm_pop_heap(oldheap); - - return ((void *) rp); + int svm_fd; + svm_region_t *rp; + pthread_mutexattr_t attr; + pthread_condattr_t cattr; + int deadman = 0; + u8 junk = 0; + void *oldheap; + int overhead_space; + int rv; + uword data_base; + int nbits, words, bit; + int pid_holding_region_lock; + u8 *shm_name; + int dead_region_recovery = 0; + int time_left; + struct stat stat; + struct timespec ts, tsrem; + + if (CLIB_DEBUG > 1) + clib_warning ("[%d] map region %s", getpid (), a->name); + + ASSERT ((a->size & ~(MMAP_PAGESIZE - 1)) == a->size); + ASSERT (a->name); + + shm_name = shm_name_from_svm_map_region_args (a); + + svm_fd = shm_open ((char *) shm_name, O_RDWR | O_CREAT | O_EXCL, 0777); + + if (svm_fd >= 0) + { + if (fchmod (svm_fd, 0770) < 0) + clib_unix_warning ("segment chmod"); + /* This turns out to fail harmlessly if the client starts first */ + if (fchown (svm_fd, a->uid, a->gid) < 0) + clib_unix_warning ("segment chown [ok if client starts first]"); + + vec_free (shm_name); + + if (lseek (svm_fd, a->size, SEEK_SET) == (off_t) - 1) + { + clib_warning ("seek region size"); + close (svm_fd); + return (0); + } + if (write (svm_fd, &junk, 1) != 1) + { + clib_warning ("set region size"); + close (svm_fd); + return (0); + } + + rp = mmap ((void *) a->baseva, a->size, + PROT_READ | PROT_WRITE, MAP_SHARED | MAP_FIXED, svm_fd, 0); + + if (rp == (svm_region_t *) MAP_FAILED) + { + clib_unix_warning ("mmap create"); + close (svm_fd); + return (0); + } + close (svm_fd); + memset (rp, 0, sizeof (*rp)); + + if (pthread_mutexattr_init (&attr)) + clib_unix_warning ("mutexattr_init"); + + if (pthread_mutexattr_setpshared (&attr, PTHREAD_PROCESS_SHARED)) + clib_unix_warning ("mutexattr_setpshared"); + + if (pthread_mutex_init (&rp->mutex, &attr)) + clib_unix_warning ("mutex_init"); + + if (pthread_mutexattr_destroy (&attr)) + clib_unix_warning ("mutexattr_destroy"); + + if (pthread_condattr_init (&cattr)) + clib_unix_warning ("condattr_init"); + + if (pthread_condattr_setpshared (&cattr, PTHREAD_PROCESS_SHARED)) + clib_unix_warning ("condattr_setpshared"); + + if (pthread_cond_init (&rp->condvar, &cattr)) + clib_unix_warning ("cond_init"); + + if (pthread_condattr_destroy (&cattr)) + clib_unix_warning ("condattr_destroy"); + + region_lock (rp, 1); + + rp->virtual_base = a->baseva; + rp->virtual_size = a->size; + + rp->region_heap = + mheap_alloc_with_flags ((void *) (a->baseva + MMAP_PAGESIZE), + SVM_PVT_MHEAP_SIZE, MHEAP_FLAG_DISABLE_VM); + oldheap = svm_push_pvt_heap (rp); + + rp->region_name = (char *) format (0, "%s%c", a->name, 0); + vec_add1 (rp->client_pids, getpid ()); + + nbits = rp->virtual_size / MMAP_PAGESIZE; + + ASSERT (nbits > 0); + rp->bitmap_size = nbits; + words = (nbits + BITS (uword) - 1) / BITS (uword); + vec_validate (rp->bitmap, words - 1); + + overhead_space = MMAP_PAGESIZE /* header */ + + SVM_PVT_MHEAP_SIZE; + + bit = 0; + data_base = (uword) rp->virtual_base; + + if (a->flags & SVM_FLAGS_NODATA) + rp->flags |= SVM_FLAGS_NEED_DATA_INIT; + + do + { + clib_bitmap_set_no_check (rp->bitmap, bit, 1); + bit++; + overhead_space -= MMAP_PAGESIZE; + data_base += MMAP_PAGESIZE; + } + while (overhead_space > 0); + + rp->data_base = (void *) data_base; + + /* + * Note: although the POSIX spec guarantees that only one + * process enters this block, we have to play games + * to hold off clients until e.g. the mutex is ready + */ + rp->version = SVM_VERSION; + + /* setup the data portion of the region */ + + rv = svm_data_region_create (a, rp); + if (rv) + { + clib_warning ("data_region_create: %d", rv); + } + + region_unlock (rp); + + svm_pop_heap (oldheap); + + return ((void *) rp); + } + else + { + svm_fd = shm_open ((char *) shm_name, O_RDWR, 0777); + + vec_free (shm_name); + + if (svm_fd < 0) + { + perror ("svm_region_map(mmap open)"); + return (0); + } + + time_left = 20; + while (1) + { + if (0 != fstat (svm_fd, &stat)) + { + clib_warning ("fstat failed: %d", errno); + close (svm_fd); + return (0); + } + if (stat.st_size > 0) + { + break; + } + if (0 == time_left) + { + clib_warning ("waiting for resize of shm file timed out"); + close (svm_fd); + return (0); + } + ts.tv_sec = 0; + ts.tv_nsec = 100000000; + while (nanosleep (&ts, &tsrem) < 0) + ts = tsrem; + time_left--; + } + + rp = mmap (0, MMAP_PAGESIZE, + PROT_READ | PROT_WRITE, MAP_SHARED, svm_fd, 0); + + if (rp == (svm_region_t *) MAP_FAILED) + { + close (svm_fd); + clib_warning ("mmap"); + return (0); + } + /* + * We lost the footrace to create this region; make sure + * the winner has crossed the finish line. + */ + while (rp->version == 0 && deadman++ < 5) + { + sleep (1); + } + + /* + * <bleep>-ed? + */ + if (rp->version == 0) + { + clib_warning ("rp->version %d not %d", rp->version, SVM_VERSION); + close (svm_fd); + munmap (rp, a->size); + return (0); + } + /* Remap now that the region has been placed */ + a->baseva = rp->virtual_base; + a->size = rp->virtual_size; + munmap (rp, MMAP_PAGESIZE); + + rp = (void *) mmap ((void *) a->baseva, a->size, + PROT_READ | PROT_WRITE, + MAP_SHARED | MAP_FIXED, svm_fd, 0); + if ((uword) rp == (uword) MAP_FAILED) + { + clib_unix_warning ("mmap"); + close (svm_fd); + return (0); + } + + if ((uword) rp != rp->virtual_base) + { + clib_warning ("mmap botch"); + } + + /* + * Try to fix the region mutex if it is held by + * a dead process + */ + pid_holding_region_lock = rp->mutex_owner_pid; + if (pid_holding_region_lock && kill (pid_holding_region_lock, 0) < 0) + { + clib_warning + ("region %s mutex held by dead pid %d, tag %d, force unlock", + rp->region_name, pid_holding_region_lock, rp->mutex_owner_tag); + /* owner pid is nonexistent */ + rp->mutex.__data.__owner = 0; + rp->mutex.__data.__lock = 0; + dead_region_recovery = 1; + } + + if (dead_region_recovery) + clib_warning ("recovery: attempt to re-lock region"); + + region_lock (rp, 2); + oldheap = svm_push_pvt_heap (rp); + vec_add1 (rp->client_pids, getpid ()); + + if (dead_region_recovery) + clib_warning ("recovery: attempt svm_data_region_map"); + + rv = svm_data_region_map (a, rp); + if (rv) + { + clib_warning ("data_region_map: %d", rv); + } + + if (dead_region_recovery) + clib_warning ("unlock and continue"); + + region_unlock (rp); + + svm_pop_heap (oldheap); + + return ((void *) rp); } - return 0; /* NOTREACHED */ + return 0; /* NOTREACHED */ } -static void svm_mutex_cleanup (void) +static void +svm_mutex_cleanup (void) { - int i; - for (i = 0; i < nheld; i++) { - pthread_mutex_unlock (mutexes_held[i]); + int i; + for (i = 0; i < nheld; i++) + { + pthread_mutex_unlock (mutexes_held[i]); } } -static void svm_region_init_internal (char *root_path, int uid, int gid) +static void +svm_region_init_internal (char *root_path, int uid, int gid) { - svm_region_t *rp; - svm_map_region_args_t _a, *a=&_a; - u64 ticks = clib_cpu_time_now(); - uword randomize_baseva; - - /* guard against klutz calls */ - if (root_rp) - return; - - root_rp_refcount++; - - atexit(svm_mutex_cleanup); - - /* Randomize the shared-VM base at init time */ - if (MMAP_PAGESIZE <= (4<<10)) - randomize_baseva = (ticks & 15) * MMAP_PAGESIZE; - else - randomize_baseva = (ticks & 3) * MMAP_PAGESIZE; - - memset (a, 0, sizeof (*a)); - a->root_path = root_path; - a->name = SVM_GLOBAL_REGION_NAME; - a->baseva = SVM_GLOBAL_REGION_BASEVA + randomize_baseva; - a->size = SVM_GLOBAL_REGION_SIZE; - a->flags = SVM_FLAGS_NODATA; - a->uid = uid; - a->gid = gid; - - rp = svm_map_region (a); - ASSERT(rp); - - region_lock(rp, 3); - - /* Set up the main region data structures */ - if (rp->flags & SVM_FLAGS_NEED_DATA_INIT) { - svm_main_region_t *mp = 0; - void *oldheap; - - rp->flags &= ~(SVM_FLAGS_NEED_DATA_INIT); - - oldheap = svm_push_pvt_heap (rp); - vec_validate (mp, 0); - mp->name_hash = hash_create_string (0, sizeof(uword)); - mp->root_path = root_path - ? format (0, "%s%c", root_path, 0) : 0 ; - rp->data_base = mp; - svm_pop_heap (oldheap); + svm_region_t *rp; + svm_map_region_args_t _a, *a = &_a; + u64 ticks = clib_cpu_time_now (); + uword randomize_baseva; + + /* guard against klutz calls */ + if (root_rp) + return; + + root_rp_refcount++; + + atexit (svm_mutex_cleanup); + + /* Randomize the shared-VM base at init time */ + if (MMAP_PAGESIZE <= (4 << 10)) + randomize_baseva = (ticks & 15) * MMAP_PAGESIZE; + else + randomize_baseva = (ticks & 3) * MMAP_PAGESIZE; + + memset (a, 0, sizeof (*a)); + a->root_path = root_path; + a->name = SVM_GLOBAL_REGION_NAME; + a->baseva = SVM_GLOBAL_REGION_BASEVA + randomize_baseva; + a->size = SVM_GLOBAL_REGION_SIZE; + a->flags = SVM_FLAGS_NODATA; + a->uid = uid; + a->gid = gid; + + rp = svm_map_region (a); + ASSERT (rp); + + region_lock (rp, 3); + + /* Set up the main region data structures */ + if (rp->flags & SVM_FLAGS_NEED_DATA_INIT) + { + svm_main_region_t *mp = 0; + void *oldheap; + + rp->flags &= ~(SVM_FLAGS_NEED_DATA_INIT); + + oldheap = svm_push_pvt_heap (rp); + vec_validate (mp, 0); + mp->name_hash = hash_create_string (0, sizeof (uword)); + mp->root_path = root_path ? format (0, "%s%c", root_path, 0) : 0; + rp->data_base = mp; + svm_pop_heap (oldheap); } - region_unlock(rp); - root_rp = rp; + region_unlock (rp); + root_rp = rp; } -void svm_region_init (void) +void +svm_region_init (void) { - svm_region_init_internal (0, 0 /* uid */, 0 /* gid */); + svm_region_init_internal (0, 0 /* uid */ , 0 /* gid */ ); } -void svm_region_init_chroot (char *root_path) +void +svm_region_init_chroot (char *root_path) { - svm_region_init_internal (root_path, 0 /* uid */, 0 /* gid */); + svm_region_init_internal (root_path, 0 /* uid */ , 0 /* gid */ ); } -void svm_region_init_chroot_uid_gid (char *root_path, int uid, int gid) +void +svm_region_init_chroot_uid_gid (char *root_path, int uid, int gid) { - svm_region_init_internal (root_path, uid, gid); + svm_region_init_internal (root_path, uid, gid); } -void *svm_region_find_or_create (svm_map_region_args_t *a) +void * +svm_region_find_or_create (svm_map_region_args_t * a) { - svm_main_region_t *mp; - svm_region_t *rp; - uword need_nbits; - int index, i; - void *oldheap; - uword *p; - u8 *name; - svm_subregion_t *subp; - - ASSERT(root_rp); - - a->size += MMAP_PAGESIZE + SVM_PVT_MHEAP_SIZE; - a->size = rnd_pagesize(a->size); - - region_lock (root_rp, 4); - oldheap = svm_push_pvt_heap(root_rp); - mp = root_rp->data_base; - - ASSERT(mp); - - /* Map the named region from the correct chroot environment */ - a->root_path = (char *) mp->root_path; - - /* - * See if this region is already known. If it is, we're - * almost done... - */ - p = hash_get_mem (mp->name_hash, a->name); - - if (p) { - rp = svm_map_region (a); - region_unlock(root_rp); - svm_pop_heap (oldheap); - return rp; + svm_main_region_t *mp; + svm_region_t *rp; + uword need_nbits; + int index, i; + void *oldheap; + uword *p; + u8 *name; + svm_subregion_t *subp; + + ASSERT (root_rp); + + a->size += MMAP_PAGESIZE + SVM_PVT_MHEAP_SIZE; + a->size = rnd_pagesize (a->size); + + region_lock (root_rp, 4); + oldheap = svm_push_pvt_heap (root_rp); + mp = root_rp->data_base; + + ASSERT (mp); + + /* Map the named region from the correct chroot environment */ + a->root_path = (char *) mp->root_path; + + /* + * See if this region is already known. If it is, we're + * almost done... + */ + p = hash_get_mem (mp->name_hash, a->name); + + if (p) + { + rp = svm_map_region (a); + region_unlock (root_rp); + svm_pop_heap (oldheap); + return rp; } - - /* Create the region. */ - ASSERT((a->size & ~(MMAP_PAGESIZE-1)) == a->size); - - need_nbits = a->size / MMAP_PAGESIZE; - - index = 1; /* $$$ fixme, figure out how many bit to really skip */ - - /* - * Scan the virtual space allocation bitmap, looking for a large - * enough chunk - */ - do { - if (clib_bitmap_get_no_check(root_rp->bitmap, index) == 0) { - for (i = 0; i < (need_nbits-1); i++) { - if (clib_bitmap_get_no_check(root_rp->bitmap, - index+i) == 1) { - index = index + i; - goto next; - } - } - break; - } - index++; + + /* Create the region. */ + ASSERT ((a->size & ~(MMAP_PAGESIZE - 1)) == a->size); + + need_nbits = a->size / MMAP_PAGESIZE; + + index = 1; /* $$$ fixme, figure out how many bit to really skip */ + + /* + * Scan the virtual space allocation bitmap, looking for a large + * enough chunk + */ + do + { + if (clib_bitmap_get_no_check (root_rp->bitmap, index) == 0) + { + for (i = 0; i < (need_nbits - 1); i++) + { + if (clib_bitmap_get_no_check (root_rp->bitmap, index + i) == 1) + { + index = index + i; + goto next; + } + } + break; + } + index++; next:; - } while (index < root_rp->bitmap_size); - - /* Completely out of VM? */ - if (index >= root_rp->bitmap_size) { - clib_warning("region %s: not enough VM to allocate 0x%x", - root_rp->region_name, a->size); - svm_pop_heap (oldheap); - region_unlock (root_rp); - return 0; } - - /* - * Mark virtual space allocated - */ + while (index < root_rp->bitmap_size); + + /* Completely out of VM? */ + if (index >= root_rp->bitmap_size) + { + clib_warning ("region %s: not enough VM to allocate 0x%x", + root_rp->region_name, a->size); + svm_pop_heap (oldheap); + region_unlock (root_rp); + return 0; + } + + /* + * Mark virtual space allocated + */ #if CLIB_DEBUG > 1 - clib_warning ("set %d bits at index %d", need_nbits, index); + clib_warning ("set %d bits at index %d", need_nbits, index); #endif - for (i = 0; i < need_nbits; i++) { - clib_bitmap_set_no_check (root_rp->bitmap, index+i, 1); + for (i = 0; i < need_nbits; i++) + { + clib_bitmap_set_no_check (root_rp->bitmap, index + i, 1); } - /* Place this region where it goes... */ - a->baseva = root_rp->virtual_base + index*MMAP_PAGESIZE; + /* Place this region where it goes... */ + a->baseva = root_rp->virtual_base + index * MMAP_PAGESIZE; + + rp = svm_map_region (a); - rp = svm_map_region (a); - - pool_get (mp->subregions, subp); - name = format (0, "%s%c", a->name, 0); - subp->subregion_name = name; + pool_get (mp->subregions, subp); + name = format (0, "%s%c", a->name, 0); + subp->subregion_name = name; - hash_set_mem (mp->name_hash, name, subp - mp->subregions); + hash_set_mem (mp->name_hash, name, subp - mp->subregions); - svm_pop_heap (oldheap); + svm_pop_heap (oldheap); - region_unlock (root_rp); + region_unlock (root_rp); - return (rp); + return (rp); } /* @@ -828,260 +914,284 @@ void *svm_region_find_or_create (svm_map_region_args_t *a) * The root region mutex guarantees atomicity with respect to * a new region client showing up at the wrong moment. */ -void svm_region_unmap (void *rp_arg) +void +svm_region_unmap (void *rp_arg) { - int i, mypid = getpid(); - int nclients_left; - void *oldheap; - uword virtual_base, virtual_size; - svm_region_t *rp = rp_arg; - char *name; - - /* - * If we take a signal while holding one or more shared-memory - * mutexes, we may end up back here from an otherwise - * benign exit handler. Bail out to avoid a recursive - * mutex screw-up. - */ - if (nheld) - return; - - ASSERT(rp); - ASSERT(root_rp); - - if (CLIB_DEBUG > 1) - clib_warning ("[%d] unmap region %s", getpid(), rp->region_name); - - region_lock (root_rp, 5); - region_lock (rp, 6); - - oldheap = svm_push_pvt_heap (rp); /* nb vec_delete() in the loop */ - - /* Remove the caller from the list of mappers */ - for (i = 0; i < vec_len(rp->client_pids); i++) { - if (rp->client_pids[i] == mypid) { - vec_delete (rp->client_pids, 1, i); - goto found; - } + int i, mypid = getpid (); + int nclients_left; + void *oldheap; + uword virtual_base, virtual_size; + svm_region_t *rp = rp_arg; + char *name; + + /* + * If we take a signal while holding one or more shared-memory + * mutexes, we may end up back here from an otherwise + * benign exit handler. Bail out to avoid a recursive + * mutex screw-up. + */ + if (nheld) + return; + + ASSERT (rp); + ASSERT (root_rp); + + if (CLIB_DEBUG > 1) + clib_warning ("[%d] unmap region %s", getpid (), rp->region_name); + + region_lock (root_rp, 5); + region_lock (rp, 6); + + oldheap = svm_push_pvt_heap (rp); /* nb vec_delete() in the loop */ + + /* Remove the caller from the list of mappers */ + for (i = 0; i < vec_len (rp->client_pids); i++) + { + if (rp->client_pids[i] == mypid) + { + vec_delete (rp->client_pids, 1, i); + goto found; + } } - clib_warning("pid %d AWOL", mypid); + clib_warning ("pid %d AWOL", mypid); - found: +found: - svm_pop_heap (oldheap); + svm_pop_heap (oldheap); - nclients_left = vec_len(rp->client_pids); - virtual_base = rp->virtual_base; - virtual_size = rp->virtual_size; + nclients_left = vec_len (rp->client_pids); + virtual_base = rp->virtual_base; + virtual_size = rp->virtual_size; - if (nclients_left == 0) { - int index, nbits, i; - svm_main_region_t *mp; - uword *p; - svm_subregion_t *subp; + if (nclients_left == 0) + { + int index, nbits, i; + svm_main_region_t *mp; + uword *p; + svm_subregion_t *subp; - /* Kill the region, last guy on his way out */ + /* Kill the region, last guy on his way out */ - oldheap = svm_push_pvt_heap (root_rp); - name = vec_dup (rp->region_name); + oldheap = svm_push_pvt_heap (root_rp); + name = vec_dup (rp->region_name); - virtual_base = rp->virtual_base; - virtual_size = rp->virtual_size; + virtual_base = rp->virtual_base; + virtual_size = rp->virtual_size; - /* Figure out which bits to clear in the root region bitmap */ - index = (virtual_base - root_rp->virtual_base) - / MMAP_PAGESIZE; + /* Figure out which bits to clear in the root region bitmap */ + index = (virtual_base - root_rp->virtual_base) / MMAP_PAGESIZE; - nbits = (virtual_size + MMAP_PAGESIZE - 1) - / MMAP_PAGESIZE; + nbits = (virtual_size + MMAP_PAGESIZE - 1) / MMAP_PAGESIZE; #if CLIB_DEBUG > 1 - clib_warning ("clear %d bits at index %d", nbits, index); + clib_warning ("clear %d bits at index %d", nbits, index); #endif - /* Give back the allocated VM */ - for (i = 0; i < nbits; i++) { - clib_bitmap_set_no_check (root_rp->bitmap, index+i, 0); - } - - mp = root_rp->data_base; - - p = hash_get_mem (mp->name_hash, name); - - /* Better never happen ... */ - if (p == NULL) { - region_unlock (rp); - region_unlock (root_rp); - svm_pop_heap (oldheap); - clib_warning ("Region name '%s' not found?", name); - return; - } - - /* Remove from the root region subregion pool */ - subp = mp->subregions + p[0]; - pool_put (mp->subregions, subp); - - hash_unset_mem (mp->name_hash, name); - - vec_free(name); - - region_unlock (rp); - shm_unlink(rp->region_name); - munmap ((void *)virtual_base, virtual_size); - region_unlock (root_rp); - svm_pop_heap (oldheap); - return; + /* Give back the allocated VM */ + for (i = 0; i < nbits; i++) + { + clib_bitmap_set_no_check (root_rp->bitmap, index + i, 0); + } + + mp = root_rp->data_base; + + p = hash_get_mem (mp->name_hash, name); + + /* Better never happen ... */ + if (p == NULL) + { + region_unlock (rp); + region_unlock (root_rp); + svm_pop_heap (oldheap); + clib_warning ("Region name '%s' not found?", name); + return; + } + + /* Remove from the root region subregion pool */ + subp = mp->subregions + p[0]; + pool_put (mp->subregions, subp); + + hash_unset_mem (mp->name_hash, name); + + vec_free (name); + + region_unlock (rp); + shm_unlink (rp->region_name); + munmap ((void *) virtual_base, virtual_size); + region_unlock (root_rp); + svm_pop_heap (oldheap); + return; } - region_unlock(rp); - region_unlock(root_rp); + region_unlock (rp); + region_unlock (root_rp); - munmap ((void *)virtual_base, virtual_size); + munmap ((void *) virtual_base, virtual_size); } /* * svm_region_exit * There is no clean way to unlink the - * root region when all clients go away, + * root region when all clients go away, * so remove the pid entry and call it a day. - */ -void svm_region_exit () + */ +void +svm_region_exit () { - void *oldheap; - int i, mypid = getpid(); - uword virtual_base, virtual_size; - - /* It felt so nice we did it twice... */ - if (root_rp == 0) - return; - - if (--root_rp_refcount > 0) - return; - - /* - * If we take a signal while holding one or more shared-memory - * mutexes, we may end up back here from an otherwise - * benign exit handler. Bail out to avoid a recursive - * mutex screw-up. - */ - if (nheld) - return; - - region_lock(root_rp, 7); - oldheap = svm_push_pvt_heap (root_rp); - - virtual_base = root_rp->virtual_base; - virtual_size = root_rp->virtual_size; - - for (i = 0; i < vec_len(root_rp->client_pids); i++) { - if (root_rp->client_pids[i] == mypid) { - vec_delete (root_rp->client_pids, 1, i); - goto found; - } + void *oldheap; + int i, mypid = getpid (); + uword virtual_base, virtual_size; + + /* It felt so nice we did it twice... */ + if (root_rp == 0) + return; + + if (--root_rp_refcount > 0) + return; + + /* + * If we take a signal while holding one or more shared-memory + * mutexes, we may end up back here from an otherwise + * benign exit handler. Bail out to avoid a recursive + * mutex screw-up. + */ + if (nheld) + return; + + region_lock (root_rp, 7); + oldheap = svm_push_pvt_heap (root_rp); + + virtual_base = root_rp->virtual_base; + virtual_size = root_rp->virtual_size; + + for (i = 0; i < vec_len (root_rp->client_pids); i++) + { + if (root_rp->client_pids[i] == mypid) + { + vec_delete (root_rp->client_pids, 1, i); + goto found; + } } - clib_warning("pid %d AWOL", mypid); + clib_warning ("pid %d AWOL", mypid); - found: +found: - region_unlock(root_rp); - svm_pop_heap (oldheap); + region_unlock (root_rp); + svm_pop_heap (oldheap); - root_rp = 0; - munmap ((void *)virtual_base, virtual_size); + root_rp = 0; + munmap ((void *) virtual_base, virtual_size); } -void svm_client_scan_this_region_nolock (svm_region_t *rp) +void +svm_client_scan_this_region_nolock (svm_region_t * rp) { - int j; - int mypid = getpid(); - void *oldheap; - - for (j = 0; j < vec_len(rp->client_pids); j++) { - if (mypid == rp->client_pids[j]) - continue; - if (rp->client_pids[j] && (kill (rp->client_pids[j], 0) < 0)) { - clib_warning ("%s: cleanup ghost pid %d", - rp->region_name, rp->client_pids[j]); - /* nb: client vec in rp->region_heap */ - oldheap = svm_push_pvt_heap (rp); - vec_delete (rp->client_pids, 1, j); - j--; - svm_pop_heap (oldheap); - } + int j; + int mypid = getpid (); + void *oldheap; + + for (j = 0; j < vec_len (rp->client_pids); j++) + { + if (mypid == rp->client_pids[j]) + continue; + if (rp->client_pids[j] && (kill (rp->client_pids[j], 0) < 0)) + { + clib_warning ("%s: cleanup ghost pid %d", + rp->region_name, rp->client_pids[j]); + /* nb: client vec in rp->region_heap */ + oldheap = svm_push_pvt_heap (rp); + vec_delete (rp->client_pids, 1, j); + j--; + svm_pop_heap (oldheap); + } } } -/* +/* * Scan svm regions for dead clients */ -void svm_client_scan(char *root_path) +void +svm_client_scan (char *root_path) { - int i, j; - svm_main_region_t *mp; - svm_map_region_args_t *a = 0; - svm_region_t *root_rp; - svm_region_t *rp; - svm_subregion_t *subp; - u8 *name=0; - u8 ** svm_names=0; - void *oldheap; - int mypid = getpid(); - - vec_validate (a, 0); - - svm_region_init_chroot(root_path); - - root_rp = svm_get_root_rp(); - - pthread_mutex_lock (&root_rp->mutex); - - mp = root_rp->data_base; - - for (j = 0; j < vec_len (root_rp->client_pids); j++) { - if (mypid == root_rp->client_pids[j]) - continue; - if (root_rp->client_pids[j] - && (kill (root_rp->client_pids[j], 0) < 0)) { - clib_warning ("%s: cleanup ghost pid %d", - root_rp->region_name, root_rp->client_pids[j]); - /* nb: client vec in root_rp->region_heap */ - oldheap = svm_push_pvt_heap (root_rp); - vec_delete (root_rp->client_pids, 1, j); - j--; - svm_pop_heap (oldheap); - } + int i, j; + svm_main_region_t *mp; + svm_map_region_args_t *a = 0; + svm_region_t *root_rp; + svm_region_t *rp; + svm_subregion_t *subp; + u8 *name = 0; + u8 **svm_names = 0; + void *oldheap; + int mypid = getpid (); + + vec_validate (a, 0); + + svm_region_init_chroot (root_path); + + root_rp = svm_get_root_rp (); + + pthread_mutex_lock (&root_rp->mutex); + + mp = root_rp->data_base; + + for (j = 0; j < vec_len (root_rp->client_pids); j++) + { + if (mypid == root_rp->client_pids[j]) + continue; + if (root_rp->client_pids[j] && (kill (root_rp->client_pids[j], 0) < 0)) + { + clib_warning ("%s: cleanup ghost pid %d", + root_rp->region_name, root_rp->client_pids[j]); + /* nb: client vec in root_rp->region_heap */ + oldheap = svm_push_pvt_heap (root_rp); + vec_delete (root_rp->client_pids, 1, j); + j--; + svm_pop_heap (oldheap); + } } - /* - * Snapshoot names, can't hold root rp mutex across - * find_or_create. - */ - pool_foreach (subp, mp->subregions, ({ - name = vec_dup (subp->subregion_name); - vec_add1(svm_names, name); - })); - - pthread_mutex_unlock (&root_rp->mutex); - - for (i = 0; i < vec_len(svm_names); i++) { - vec_validate(a, 0); - a->root_path = root_path; - a->name = (char *) svm_names[i]; - rp = svm_region_find_or_create (a); - if (rp) { - pthread_mutex_lock (&rp->mutex); - - svm_client_scan_this_region_nolock (rp); - - pthread_mutex_unlock (&rp->mutex); - svm_region_unmap (rp); - vec_free(svm_names[i]); - } - vec_free (a); + /* + * Snapshoot names, can't hold root rp mutex across + * find_or_create. + */ + /* *INDENT-OFF* */ + pool_foreach (subp, mp->subregions, ({ + name = vec_dup (subp->subregion_name); + vec_add1(svm_names, name); + })); + /* *INDENT-ON* */ + + pthread_mutex_unlock (&root_rp->mutex); + + for (i = 0; i < vec_len (svm_names); i++) + { + vec_validate (a, 0); + a->root_path = root_path; + a->name = (char *) svm_names[i]; + rp = svm_region_find_or_create (a); + if (rp) + { + pthread_mutex_lock (&rp->mutex); + + svm_client_scan_this_region_nolock (rp); + + pthread_mutex_unlock (&rp->mutex); + svm_region_unmap (rp); + vec_free (svm_names[i]); + } + vec_free (a); } - vec_free(svm_names); + vec_free (svm_names); - svm_region_exit (); + svm_region_exit (); - vec_free (a); + vec_free (a); } + +/* + * fd.io coding-style-patch-verification: ON + * + * Local Variables: + * eval: (c-set-style "gnu") + * End: + */ diff --git a/svm/svm.h b/svm/svm.h index bca23792059..1682b7ad2fa 100644 --- a/svm/svm.h +++ b/svm/svm.h @@ -1,6 +1,6 @@ -/* +/* *------------------------------------------------------------------ - * svm.h - shared VM allocation, mmap(...MAP_FIXED...) + * svm.h - shared VM allocation, mmap(...MAP_FIXED...) * brain police * * Copyright (c) 2009 Cisco and/or its affiliates. @@ -27,162 +27,178 @@ #define MMAP_PAGESIZE (clib_mem_get_page_size()) -#define SVM_VERSION ((1<<16) | 1) /* set to declare region ready. */ - -#define SVM_FLAGS_MHEAP (1<<0) /* region contains an mheap */ -#define SVM_FLAGS_FILE (1<<1) /* region backed by one or more files */ -#define SVM_FLAGS_NODATA (1<<2) /* region will be further subdivided */ -#define SVM_FLAGS_NEED_DATA_INIT (1<<3) - -#define SVM_PVT_MHEAP_SIZE (128<<10) /* region's private mheap (128k) */ - -typedef struct svm_region_ { - volatile uword version; - pthread_mutex_t mutex; - pthread_cond_t condvar; - int mutex_owner_pid; /* in case of trouble */ - int mutex_owner_tag; - uword flags; - uword virtual_base; /* base of the region object */ - uword virtual_size; - void *region_heap; - void *data_base; /* data portion base address */ - void *data_heap; /* data heap, if any */ - volatile void *user_ctx; /* user context pointer */ - /* stuff allocated in the region's heap */ - uword bitmap_size; /* nbits in virtual alloc bitmap */ - uword *bitmap; /* the bitmap */ - char *region_name; - char *backing_file; - char **filenames; - uword *client_pids; - /* pad */ - - /* next page: - * (64K) clib heap for the region itself - * - * data_base -> whatever is in this region - */ +#define SVM_VERSION ((1<<16) | 1) /* set to declare region ready. */ + +#define SVM_FLAGS_MHEAP (1<<0) /* region contains an mheap */ +#define SVM_FLAGS_FILE (1<<1) /* region backed by one or more files */ +#define SVM_FLAGS_NODATA (1<<2) /* region will be further subdivided */ +#define SVM_FLAGS_NEED_DATA_INIT (1<<3) + +#define SVM_PVT_MHEAP_SIZE (128<<10) /* region's private mheap (128k) */ + +typedef struct svm_region_ +{ + volatile uword version; + pthread_mutex_t mutex; + pthread_cond_t condvar; + int mutex_owner_pid; /* in case of trouble */ + int mutex_owner_tag; + uword flags; + uword virtual_base; /* base of the region object */ + uword virtual_size; + void *region_heap; + void *data_base; /* data portion base address */ + void *data_heap; /* data heap, if any */ + volatile void *user_ctx; /* user context pointer */ + /* stuff allocated in the region's heap */ + uword bitmap_size; /* nbits in virtual alloc bitmap */ + uword *bitmap; /* the bitmap */ + char *region_name; + char *backing_file; + char **filenames; + uword *client_pids; + /* pad */ + + /* next page: + * (64K) clib heap for the region itself + * + * data_base -> whatever is in this region + */ } svm_region_t; -typedef struct svm_map_region_args_ { - char *root_path; /* NULL means use the truly global arena */ - char *name; - uword baseva; - uword size; - uword flags; - char *backing_file; - uword backing_mmap_size; - /* uid, gid to own the svm region(s) */ - int uid; - int gid; +typedef struct svm_map_region_args_ +{ + char *root_path; /* NULL means use the truly global arena */ + char *name; + uword baseva; + uword size; + uword flags; + char *backing_file; + uword backing_mmap_size; + /* uid, gid to own the svm region(s) */ + int uid; + int gid; } svm_map_region_args_t; /* - * Memory shared across all router instances. Packet buffers, etc - * Base should be "out of the way," and size should be big enough to + * Memory shared across all router instances. Packet buffers, etc + * Base should be "out of the way," and size should be big enough to * cover everything we plan to put here. */ #define SVM_GLOBAL_REGION_BASEVA 0x30000000 -#define SVM_GLOBAL_REGION_SIZE (64<<20) +#define SVM_GLOBAL_REGION_SIZE (64<<20) #define SVM_GLOBAL_REGION_NAME "/global_vm" /* - * Memory shared across individual router instances. + * Memory shared across individual router instances. */ #define SVM_OVERLAY_REGION_BASEVA \ (SVM_GLOBAL_REGION_BASEVA + SVM_GLOBAL_REGION_SIZE) -#define SVM_OVERLAY_REGION_SIZE (1<<20) +#define SVM_OVERLAY_REGION_SIZE (1<<20) #define SVM_OVERLAY_REGION_BASENAME "/overlay_vm" -typedef struct { - u8 *subregion_name; +typedef struct +{ + u8 *subregion_name; } svm_subregion_t; -typedef struct { - svm_subregion_t *subregions; /* subregion pool */ - uword *name_hash; - u8 *root_path; +typedef struct +{ + svm_subregion_t *subregions; /* subregion pool */ + uword *name_hash; + u8 *root_path; } svm_main_region_t; -void *svm_region_find_or_create (svm_map_region_args_t *a); -void svm_region_init(void); -void svm_region_init_chroot(char *root_path); -void svm_region_init_chroot_uid_gid(char *root_path, int uid, int gid); +void *svm_region_find_or_create (svm_map_region_args_t * a); +void svm_region_init (void); +void svm_region_init_chroot (char *root_path); +void svm_region_init_chroot_uid_gid (char *root_path, int uid, int gid); void svm_region_exit (void); -void svm_region_unmap(void *rp_arg); +void svm_region_unmap (void *rp_arg); void svm_client_scan (char *root_path); -void svm_client_scan_this_region_nolock (svm_region_t *rp); -u8 *shm_name_from_svm_map_region_args (svm_map_region_args_t *a); +void svm_client_scan_this_region_nolock (svm_region_t * rp); +u8 *shm_name_from_svm_map_region_args (svm_map_region_args_t * a); -static inline void *svm_mem_alloc (svm_region_t *rp, uword size) +static inline void * +svm_mem_alloc (svm_region_t * rp, uword size) { - u8 *oldheap; - ASSERT(rp->flags & SVM_FLAGS_MHEAP); - u8 *rv; - - pthread_mutex_lock(&rp->mutex); - oldheap = clib_mem_set_heap(rp->data_heap); - rv = clib_mem_alloc (size); - clib_mem_set_heap(oldheap); - pthread_mutex_unlock(&rp->mutex); - return (rv); + u8 *oldheap; + ASSERT (rp->flags & SVM_FLAGS_MHEAP); + u8 *rv; + + pthread_mutex_lock (&rp->mutex); + oldheap = clib_mem_set_heap (rp->data_heap); + rv = clib_mem_alloc (size); + clib_mem_set_heap (oldheap); + pthread_mutex_unlock (&rp->mutex); + return (rv); } -static inline void *svm_mem_alloc_aligned_at_offset (svm_region_t *rp, - uword size, - uword align, - uword offset) +static inline void * +svm_mem_alloc_aligned_at_offset (svm_region_t * rp, + uword size, uword align, uword offset) { - u8 *oldheap; - ASSERT(rp->flags & SVM_FLAGS_MHEAP); - u8 *rv; - - pthread_mutex_lock(&rp->mutex); - oldheap = clib_mem_set_heap(rp->data_heap); - rv = clib_mem_alloc_aligned_at_offset (size, align, offset); - clib_mem_set_heap(oldheap); - pthread_mutex_unlock(&rp->mutex); - return (rv); + u8 *oldheap; + ASSERT (rp->flags & SVM_FLAGS_MHEAP); + u8 *rv; + + pthread_mutex_lock (&rp->mutex); + oldheap = clib_mem_set_heap (rp->data_heap); + rv = clib_mem_alloc_aligned_at_offset (size, align, offset); + clib_mem_set_heap (oldheap); + pthread_mutex_unlock (&rp->mutex); + return (rv); } -static inline void svm_mem_free (svm_region_t *rp, void *ptr) +static inline void +svm_mem_free (svm_region_t * rp, void *ptr) { - u8 *oldheap; - ASSERT(rp->flags & SVM_FLAGS_MHEAP); + u8 *oldheap; + ASSERT (rp->flags & SVM_FLAGS_MHEAP); - pthread_mutex_lock(&rp->mutex); - oldheap = clib_mem_set_heap(rp->data_heap); - clib_mem_free (ptr); - clib_mem_set_heap(oldheap); - pthread_mutex_unlock(&rp->mutex); + pthread_mutex_lock (&rp->mutex); + oldheap = clib_mem_set_heap (rp->data_heap); + clib_mem_free (ptr); + clib_mem_set_heap (oldheap); + pthread_mutex_unlock (&rp->mutex); } -static inline void *svm_push_pvt_heap (svm_region_t *rp) +static inline void * +svm_push_pvt_heap (svm_region_t * rp) { - u8 *oldheap; - oldheap = clib_mem_set_heap(rp->region_heap); - return ((void *) oldheap); + u8 *oldheap; + oldheap = clib_mem_set_heap (rp->region_heap); + return ((void *) oldheap); } -static inline void *svm_push_data_heap (svm_region_t *rp) +static inline void * +svm_push_data_heap (svm_region_t * rp) { - u8 *oldheap; - oldheap = clib_mem_set_heap(rp->data_heap); - return ((void *) oldheap); + u8 *oldheap; + oldheap = clib_mem_set_heap (rp->data_heap); + return ((void *) oldheap); } -static inline void svm_pop_heap (void *oldheap) +static inline void +svm_pop_heap (void *oldheap) { - clib_mem_set_heap(oldheap); + clib_mem_set_heap (oldheap); } -u8 * format_svm_region (u8 * s, va_list * args); +u8 *format_svm_region (u8 * s, va_list * args); svm_region_t *svm_get_root_rp (void); #endif /* __included_svm_h__ */ + +/* + * fd.io coding-style-patch-verification: ON + * + * Local Variables: + * eval: (c-set-style "gnu") + * End: + */ diff --git a/svm/svm_test.c b/svm/svm_test.c index a93ca4889b2..ab0b9e248e6 100644 --- a/svm/svm_test.c +++ b/svm/svm_test.c @@ -12,7 +12,7 @@ * See the License for the specific language governing permissions and * limitations under the License. */ -/* +/* *------------------------------------------------------------------ * svm_test.c -- brain police *------------------------------------------------------------------ @@ -43,28 +43,37 @@ #include "svm.h" -int main (int argc, char **argv) +int +main (int argc, char **argv) { - svm_region_t *root_rp, *rp; - svm_map_region_args_t *a = 0; + svm_region_t *root_rp, *rp; + svm_map_region_args_t *a = 0; - vec_validate (a, 0); + vec_validate (a, 0); - root_rp = svm_region_init(); + root_rp = svm_region_init (); - ASSERT (root_rp); + ASSERT (root_rp); - a->name = "/qvnet"; - a->size = (4<<10); + a->name = "/qvnet"; + a->size = (4 << 10); - rp = svm_region_find_or_create (root_rp, a); + rp = svm_region_find_or_create (root_rp, a); - ASSERT (rp); + ASSERT (rp); - *((u32 *)rp->data_base) = 0xdeadbeef; - svm_region_unmap (root_rp, rp); + *((u32 *) rp->data_base) = 0xdeadbeef; + svm_region_unmap (root_rp, rp); - fformat(stdout, "exiting...\n"); + fformat (stdout, "exiting...\n"); - exit (0); + exit (0); } + +/* + * fd.io coding-style-patch-verification: ON + * + * Local Variables: + * eval: (c-set-style "gnu") + * End: + */ diff --git a/svm/svmdb.c b/svm/svmdb.c index 481224a6742..b22d2fab1bb 100644 --- a/svm/svmdb.c +++ b/svm/svmdb.c @@ -1,4 +1,4 @@ -/* +/* *------------------------------------------------------------------ * svmdb.c -- simple shared memory database * @@ -42,479 +42,533 @@ #include "svmdb.h" -static void local_set_variable_nolock (svmdb_client_t *client, - svmdb_namespace_t namespace, - u8 * var, u8 * val, u32 elsize); +static void local_set_variable_nolock (svmdb_client_t * client, + svmdb_namespace_t namespace, + u8 * var, u8 * val, u32 elsize); -always_inline void region_lock(svm_region_t *rp, int tag) +always_inline void +region_lock (svm_region_t * rp, int tag) { - pthread_mutex_lock(&rp->mutex); + pthread_mutex_lock (&rp->mutex); #ifdef MUTEX_DEBUG - rp->mutex_owner_pid = getpid(); - rp->mutex_owner_tag = tag; -#endif + rp->mutex_owner_pid = getpid (); + rp->mutex_owner_tag = tag; +#endif } -always_inline void region_unlock(svm_region_t *rp) +always_inline void +region_unlock (svm_region_t * rp) { #ifdef MUTEX_DEBUG - rp->mutex_owner_pid = 0; - rp->mutex_owner_tag = 0; -#endif - pthread_mutex_unlock(&rp->mutex); + rp->mutex_owner_pid = 0; + rp->mutex_owner_tag = 0; +#endif + pthread_mutex_unlock (&rp->mutex); } -static svmdb_client_t *svmdb_map_internal (char *root_path, uword size) +static svmdb_client_t * +svmdb_map_internal (char *root_path, uword size) { - svmdb_client_t *client = 0; - svm_map_region_args_t *a = 0; - svm_region_t *db_rp; - void *oldheap; - svmdb_shm_hdr_t *hp = 0; - - vec_validate (client, 0); - vec_validate (a, 0); - - svm_region_init_chroot(root_path); - - a->root_path = root_path; - a->name = "/db"; - a->size = size ? size : SVMDB_DEFAULT_SIZE; - a->flags = SVM_FLAGS_MHEAP; - - db_rp = client->db_rp = svm_region_find_or_create (a); - - ASSERT(db_rp); - - vec_free (a); - - region_lock (client->db_rp, 10); - /* Has someone else set up the shared-memory variable table? */ - if (db_rp->user_ctx) { - client->shm = (void *) db_rp->user_ctx; - client->pid = getpid(); - region_unlock (client->db_rp); - ASSERT (client->shm->version == SVMDB_SHM_VERSION); - return (client); + svmdb_client_t *client = 0; + svm_map_region_args_t *a = 0; + svm_region_t *db_rp; + void *oldheap; + svmdb_shm_hdr_t *hp = 0; + + vec_validate (client, 0); + vec_validate (a, 0); + + svm_region_init_chroot (root_path); + + a->root_path = root_path; + a->name = "/db"; + a->size = size ? size : SVMDB_DEFAULT_SIZE; + a->flags = SVM_FLAGS_MHEAP; + + db_rp = client->db_rp = svm_region_find_or_create (a); + + ASSERT (db_rp); + + vec_free (a); + + region_lock (client->db_rp, 10); + /* Has someone else set up the shared-memory variable table? */ + if (db_rp->user_ctx) + { + client->shm = (void *) db_rp->user_ctx; + client->pid = getpid (); + region_unlock (client->db_rp); + ASSERT (client->shm->version == SVMDB_SHM_VERSION); + return (client); } - /* Nope, it's our problem... */ - - /* Add a bogus client (pid=0) so the svm won't be deallocated */ - oldheap = svm_push_pvt_heap (db_rp); - vec_add1(client->db_rp->client_pids, 0); - svm_pop_heap (oldheap); - - oldheap = svm_push_data_heap (db_rp); - - vec_validate(hp, 0); - hp->version = SVMDB_SHM_VERSION; - hp->namespaces[SVMDB_NAMESPACE_STRING] - = hash_create_string(0, sizeof(uword)); - hp->namespaces[SVMDB_NAMESPACE_VEC] - = hash_create_string(0, sizeof(uword)); - - db_rp->user_ctx = hp; - client->shm = hp; - - svm_pop_heap (oldheap); - region_unlock (client->db_rp); - client->pid = getpid(); - - return (client); + /* Nope, it's our problem... */ + + /* Add a bogus client (pid=0) so the svm won't be deallocated */ + oldheap = svm_push_pvt_heap (db_rp); + vec_add1 (client->db_rp->client_pids, 0); + svm_pop_heap (oldheap); + + oldheap = svm_push_data_heap (db_rp); + + vec_validate (hp, 0); + hp->version = SVMDB_SHM_VERSION; + hp->namespaces[SVMDB_NAMESPACE_STRING] + = hash_create_string (0, sizeof (uword)); + hp->namespaces[SVMDB_NAMESPACE_VEC] + = hash_create_string (0, sizeof (uword)); + + db_rp->user_ctx = hp; + client->shm = hp; + + svm_pop_heap (oldheap); + region_unlock (client->db_rp); + client->pid = getpid (); + + return (client); } -svmdb_client_t *svmdb_map (void) + +svmdb_client_t * +svmdb_map (void) { - return svmdb_map_internal (0, 0); + return svmdb_map_internal (0, 0); } -svmdb_client_t *svmdb_map_size (uword size) +svmdb_client_t * +svmdb_map_size (uword size) { - return svmdb_map_internal (0, size); + return svmdb_map_internal (0, size); } -svmdb_client_t *svmdb_map_chroot (char *root_path) +svmdb_client_t * +svmdb_map_chroot (char *root_path) { - return svmdb_map_internal (root_path, 0); + return svmdb_map_internal (root_path, 0); } -svmdb_client_t *svmdb_map_chroot_size (char *root_path, uword size) +svmdb_client_t * +svmdb_map_chroot_size (char *root_path, uword size) { - return svmdb_map_internal (root_path, size); + return svmdb_map_internal (root_path, size); } -void svmdb_unmap (svmdb_client_t *client) +void +svmdb_unmap (svmdb_client_t * client) { - ASSERT(client); + ASSERT (client); - if (! svm_get_root_rp()) - return; + if (!svm_get_root_rp ()) + return; - svm_region_unmap ((void *) client->db_rp); - svm_region_exit (); - vec_free(client); + svm_region_unmap ((void *) client->db_rp); + svm_region_exit (); + vec_free (client); } -static void notify_value (svmdb_value_t * v, svmdb_action_t a) +static void +notify_value (svmdb_value_t * v, svmdb_action_t a) { - int i; - int rv; - union sigval sv; - u32 value; - u32 *dead_registrations = 0; - - svmdb_notify_t *np; - - for (i = 0; i < vec_len (v->notifications); i++) { - np = vec_elt_at_index (v->notifications, i); - if (np->action == a) { - value = (np->action<<28) | (np->opaque); - sv.sival_ptr = (void *)(uword)value; - do { - rv = 0; - if (sigqueue (np->pid, np->signum, sv) == 0) - break; - rv = errno; - } while (rv == EAGAIN); - if (rv == 0) - continue; - vec_add1 (dead_registrations, i); - } + int i; + int rv; + union sigval sv; + u32 value; + u32 *dead_registrations = 0; + + svmdb_notify_t *np; + + for (i = 0; i < vec_len (v->notifications); i++) + { + np = vec_elt_at_index (v->notifications, i); + if (np->action == a) + { + value = (np->action << 28) | (np->opaque); + sv.sival_ptr = (void *) (uword) value; + do + { + rv = 0; + if (sigqueue (np->pid, np->signum, sv) == 0) + break; + rv = errno; + } + while (rv == EAGAIN); + if (rv == 0) + continue; + vec_add1 (dead_registrations, i); + } } - for (i = 0; i < vec_len (dead_registrations); i++) { - np = vec_elt_at_index (v->notifications, dead_registrations[i]); - clib_warning ("dead reg pid %d sig %d action %d opaque %x", - np->pid, np->signum, np->action, np->opaque); - vec_delete (v->notifications, 1, dead_registrations[i]); + for (i = 0; i < vec_len (dead_registrations); i++) + { + np = vec_elt_at_index (v->notifications, dead_registrations[i]); + clib_warning ("dead reg pid %d sig %d action %d opaque %x", + np->pid, np->signum, np->action, np->opaque); + vec_delete (v->notifications, 1, dead_registrations[i]); } - vec_free (dead_registrations); + vec_free (dead_registrations); } -int svmdb_local_add_del_notification (svmdb_client_t *client, - svmdb_notification_args_t *a) +int +svmdb_local_add_del_notification (svmdb_client_t * client, + svmdb_notification_args_t * a) { - uword *h; - void *oldheap; - hash_pair_t *hp; - svmdb_shm_hdr_t * shm; - u8 *dummy_value = 0; - svmdb_value_t *value; - svmdb_notify_t *np; - int i; - int rv = 0; - - ASSERT (a->elsize); - - region_lock (client->db_rp, 18); - shm = client->shm; - oldheap = svm_push_data_heap (client->db_rp); - - h = shm->namespaces[a->nspace]; - - hp = hash_get_pair_mem (h, a->var); - if (hp == 0) { - local_set_variable_nolock (client, a->nspace, (u8 *)a->var, - dummy_value, a->elsize); - /* might have moved */ - h = shm->namespaces[a->nspace]; - hp = hash_get_pair_mem (h, a->var); - ASSERT(hp); + uword *h; + void *oldheap; + hash_pair_t *hp; + svmdb_shm_hdr_t *shm; + u8 *dummy_value = 0; + svmdb_value_t *value; + svmdb_notify_t *np; + int i; + int rv = 0; + + ASSERT (a->elsize); + + region_lock (client->db_rp, 18); + shm = client->shm; + oldheap = svm_push_data_heap (client->db_rp); + + h = shm->namespaces[a->nspace]; + + hp = hash_get_pair_mem (h, a->var); + if (hp == 0) + { + local_set_variable_nolock (client, a->nspace, (u8 *) a->var, + dummy_value, a->elsize); + /* might have moved */ + h = shm->namespaces[a->nspace]; + hp = hash_get_pair_mem (h, a->var); + ASSERT (hp); } - - value = pool_elt_at_index (shm->values, hp->value[0]); - - for (i = 0; i < vec_len (value->notifications); i++) { - np = vec_elt_at_index (value->notifications, i); - if ((np->pid == client->pid) - && (np->signum == a->signum) - && (np->action == a->action) - && (np->opaque == a->opaque)) { - if (a->add_del == 0 /* delete */) { - vec_delete (value->notifications, 1, i); - goto out; - } else { /* add */ - clib_warning ( - "%s: ignore dup reg pid %d signum %d action %d opaque %x", - a->var, client->pid, a->signum, a->action, a->opaque); - rv = -2; - goto out; - } - } + + value = pool_elt_at_index (shm->values, hp->value[0]); + + for (i = 0; i < vec_len (value->notifications); i++) + { + np = vec_elt_at_index (value->notifications, i); + if ((np->pid == client->pid) + && (np->signum == a->signum) + && (np->action == a->action) && (np->opaque == a->opaque)) + { + if (a->add_del == 0 /* delete */ ) + { + vec_delete (value->notifications, 1, i); + goto out; + } + else + { /* add */ + clib_warning + ("%s: ignore dup reg pid %d signum %d action %d opaque %x", + a->var, client->pid, a->signum, a->action, a->opaque); + rv = -2; + goto out; + } + } } - if (a->add_del == 0) { - rv = -3; - goto out; + if (a->add_del == 0) + { + rv = -3; + goto out; } - - vec_add2 (value->notifications, np, 1); - np->pid = client->pid; - np->signum = a->signum; - np->action = a->action; - np->opaque = a->opaque; + + vec_add2 (value->notifications, np, 1); + np->pid = client->pid; + np->signum = a->signum; + np->action = a->action; + np->opaque = a->opaque; out: - svm_pop_heap(oldheap); - region_unlock (client->db_rp); - return rv; + svm_pop_heap (oldheap); + region_unlock (client->db_rp); + return rv; } -static void local_unset_variable_nolock (svmdb_client_t *client, - svmdb_namespace_t namespace, - char * var) +static void +local_unset_variable_nolock (svmdb_client_t * client, + svmdb_namespace_t namespace, char *var) { - uword *h; - svmdb_value_t *oldvalue; - hash_pair_t *hp; - - h = client->shm->namespaces[namespace]; - hp = hash_get_pair_mem (h, var); - if (hp) { - oldvalue = pool_elt_at_index (client->shm->values, hp->value[0]); - if (vec_len (oldvalue->notifications)) - notify_value (oldvalue, SVMDB_ACTION_UNSET); - /* zero length value means unset */ - _vec_len (oldvalue->value) = 0; + uword *h; + svmdb_value_t *oldvalue; + hash_pair_t *hp; + + h = client->shm->namespaces[namespace]; + hp = hash_get_pair_mem (h, var); + if (hp) + { + oldvalue = pool_elt_at_index (client->shm->values, hp->value[0]); + if (vec_len (oldvalue->notifications)) + notify_value (oldvalue, SVMDB_ACTION_UNSET); + /* zero length value means unset */ + _vec_len (oldvalue->value) = 0; } - client->shm->namespaces[namespace] = h; + client->shm->namespaces[namespace] = h; } -void svmdb_local_unset_string_variable (svmdb_client_t *client, char *var) +void +svmdb_local_unset_string_variable (svmdb_client_t * client, char *var) { - void *oldheap; + void *oldheap; - region_lock (client->db_rp, 11); - oldheap = svm_push_data_heap (client->db_rp); - local_unset_variable_nolock (client, SVMDB_NAMESPACE_STRING, var); - svm_pop_heap(oldheap); - region_unlock (client->db_rp); + region_lock (client->db_rp, 11); + oldheap = svm_push_data_heap (client->db_rp); + local_unset_variable_nolock (client, SVMDB_NAMESPACE_STRING, var); + svm_pop_heap (oldheap); + region_unlock (client->db_rp); } -static void local_set_variable_nolock (svmdb_client_t *client, - svmdb_namespace_t namespace, - u8 * var, u8 * val, u32 elsize) +static void +local_set_variable_nolock (svmdb_client_t * client, + svmdb_namespace_t namespace, + u8 * var, u8 * val, u32 elsize) { - uword *h; - hash_pair_t *hp; - u8 *name; - svmdb_shm_hdr_t * shm; - - shm = client->shm; - h = shm->namespaces[namespace]; - hp = hash_get_pair_mem (h, var); - if (hp) { - svmdb_value_t * oldvalue; - oldvalue = pool_elt_at_index (client->shm->values, hp->value[0]); - vec_alloc (oldvalue->value, vec_len(val)*elsize); - clib_memcpy (oldvalue->value, val, vec_len(val)*elsize); - _vec_len (oldvalue->value) = vec_len(val); - notify_value (oldvalue, SVMDB_ACTION_SET); - } else { - svmdb_value_t * newvalue; - pool_get (shm->values, newvalue); - memset (newvalue, 0, sizeof (*newvalue)); - newvalue->elsize = elsize; - vec_alloc (newvalue->value, vec_len(val)*elsize); - clib_memcpy (newvalue->value, val, vec_len(val)*elsize); - _vec_len (newvalue->value) = vec_len(val); - name = format (0, "%s%c", var, 0); - hash_set_mem (h, name, newvalue - shm->values); + uword *h; + hash_pair_t *hp; + u8 *name; + svmdb_shm_hdr_t *shm; + + shm = client->shm; + h = shm->namespaces[namespace]; + hp = hash_get_pair_mem (h, var); + if (hp) + { + svmdb_value_t *oldvalue; + oldvalue = pool_elt_at_index (client->shm->values, hp->value[0]); + vec_alloc (oldvalue->value, vec_len (val) * elsize); + clib_memcpy (oldvalue->value, val, vec_len (val) * elsize); + _vec_len (oldvalue->value) = vec_len (val); + notify_value (oldvalue, SVMDB_ACTION_SET); + } + else + { + svmdb_value_t *newvalue; + pool_get (shm->values, newvalue); + memset (newvalue, 0, sizeof (*newvalue)); + newvalue->elsize = elsize; + vec_alloc (newvalue->value, vec_len (val) * elsize); + clib_memcpy (newvalue->value, val, vec_len (val) * elsize); + _vec_len (newvalue->value) = vec_len (val); + name = format (0, "%s%c", var, 0); + hash_set_mem (h, name, newvalue - shm->values); } - shm->namespaces[namespace] = h; + shm->namespaces[namespace] = h; } -void svmdb_local_set_string_variable (svmdb_client_t *client, - char *var, char *val) +void +svmdb_local_set_string_variable (svmdb_client_t * client, + char *var, char *val) { - void *oldheap; + void *oldheap; - region_lock (client->db_rp, 12); - oldheap = svm_push_data_heap (client->db_rp); + region_lock (client->db_rp, 12); + oldheap = svm_push_data_heap (client->db_rp); - local_unset_variable_nolock (client, SVMDB_NAMESPACE_STRING, var); + local_unset_variable_nolock (client, SVMDB_NAMESPACE_STRING, var); - local_set_variable_nolock (client, SVMDB_NAMESPACE_STRING, - (u8 *) var, (u8 *) val, 1 /* elsize */); - svm_pop_heap(oldheap); - region_unlock (client->db_rp); + local_set_variable_nolock (client, SVMDB_NAMESPACE_STRING, + (u8 *) var, (u8 *) val, 1 /* elsize */ ); + svm_pop_heap (oldheap); + region_unlock (client->db_rp); } -static u8 * local_get_variable_nolock (svmdb_client_t *client, - svmdb_namespace_t namespace, - u8 * var) +static u8 * +local_get_variable_nolock (svmdb_client_t * client, + svmdb_namespace_t namespace, u8 * var) { - uword *h; - uword *p; - svmdb_shm_hdr_t * shm; - svmdb_value_t *oldvalue; - - shm = client->shm; - h = shm->namespaces[namespace]; - p = hash_get_mem (h, var); - if (p) { - oldvalue = pool_elt_at_index (shm->values, p[0]); - notify_value (oldvalue, SVMDB_ACTION_GET); - return (oldvalue->value); + uword *h; + uword *p; + svmdb_shm_hdr_t *shm; + svmdb_value_t *oldvalue; + + shm = client->shm; + h = shm->namespaces[namespace]; + p = hash_get_mem (h, var); + if (p) + { + oldvalue = pool_elt_at_index (shm->values, p[0]); + notify_value (oldvalue, SVMDB_ACTION_GET); + return (oldvalue->value); } - return 0; + return 0; } -void *svmdb_local_get_variable_reference (svmdb_client_t *client, - svmdb_namespace_t namespace, - char *var) +void * +svmdb_local_get_variable_reference (svmdb_client_t * client, + svmdb_namespace_t namespace, char *var) { - u8 *rv; + u8 *rv; - region_lock (client->db_rp, 19); - rv = local_get_variable_nolock (client, namespace, (u8 *)var); - region_unlock (client->db_rp); - return (void *)rv; + region_lock (client->db_rp, 19); + rv = local_get_variable_nolock (client, namespace, (u8 *) var); + region_unlock (client->db_rp); + return (void *) rv; } -char *svmdb_local_get_string_variable (svmdb_client_t *client, char *var) +char * +svmdb_local_get_string_variable (svmdb_client_t * client, char *var) { - u8 *rv = 0; + u8 *rv = 0; - region_lock (client->db_rp, 13); - rv = local_get_variable_nolock (client, SVMDB_NAMESPACE_STRING, (u8 *) var); + region_lock (client->db_rp, 13); + rv = local_get_variable_nolock (client, SVMDB_NAMESPACE_STRING, (u8 *) var); - if (rv && vec_len (rv)) { - rv = format (0, "%s", rv); - vec_add1(rv, 0); + if (rv && vec_len (rv)) + { + rv = format (0, "%s", rv); + vec_add1 (rv, 0); } - region_unlock (client->db_rp); - return ((char *) rv); + region_unlock (client->db_rp); + return ((char *) rv); } -void svmdb_local_dump_strings (svmdb_client_t *client) +void +svmdb_local_dump_strings (svmdb_client_t * client) { - uword *h; - u8 *key; - u32 value; - svmdb_shm_hdr_t *shm = client->shm; - - region_lock (client->db_rp, 14); - - h = client->shm->namespaces [SVMDB_NAMESPACE_STRING]; - - hash_foreach_mem(key, value, h, - ({ - svmdb_value_t *v = pool_elt_at_index (shm->values, value); - - fformat(stdout, "%s: %s\n", key, - vec_len(v->value) ? v->value : (u8 *)"(nil)"); - })); - region_unlock (client->db_rp); + uword *h; + u8 *key; + u32 value; + svmdb_shm_hdr_t *shm = client->shm; + + region_lock (client->db_rp, 14); + + h = client->shm->namespaces[SVMDB_NAMESPACE_STRING]; + + /* *INDENT-OFF* */ + hash_foreach_mem(key, value, h, + ({ + svmdb_value_t *v = pool_elt_at_index (shm->values, value); + + fformat(stdout, "%s: %s\n", key, + vec_len(v->value) ? v->value : (u8 *)"(nil)"); + })); + /* *INDENT-ON* */ + region_unlock (client->db_rp); } -void svmdb_local_unset_vec_variable (svmdb_client_t *client, char *var) +void +svmdb_local_unset_vec_variable (svmdb_client_t * client, char *var) { - void *oldheap; + void *oldheap; - region_lock (client->db_rp, 15); - oldheap = svm_push_data_heap (client->db_rp); - local_unset_variable_nolock (client, SVMDB_NAMESPACE_VEC, var); - svm_pop_heap(oldheap); - region_unlock (client->db_rp); + region_lock (client->db_rp, 15); + oldheap = svm_push_data_heap (client->db_rp); + local_unset_variable_nolock (client, SVMDB_NAMESPACE_VEC, var); + svm_pop_heap (oldheap); + region_unlock (client->db_rp); } -void svmdb_local_set_vec_variable (svmdb_client_t *client, - char *var, void *val_arg, u32 elsize) +void +svmdb_local_set_vec_variable (svmdb_client_t * client, + char *var, void *val_arg, u32 elsize) { - u8 *val = (u8 *)val_arg; - void *oldheap; + u8 *val = (u8 *) val_arg; + void *oldheap; - region_lock (client->db_rp, 16); - oldheap = svm_push_data_heap (client->db_rp); + region_lock (client->db_rp, 16); + oldheap = svm_push_data_heap (client->db_rp); - local_unset_variable_nolock (client, SVMDB_NAMESPACE_VEC, var); - local_set_variable_nolock (client, SVMDB_NAMESPACE_VEC, (u8 *) var, - val, elsize); + local_unset_variable_nolock (client, SVMDB_NAMESPACE_VEC, var); + local_set_variable_nolock (client, SVMDB_NAMESPACE_VEC, (u8 *) var, + val, elsize); - svm_pop_heap(oldheap); - region_unlock (client->db_rp); + svm_pop_heap (oldheap); + region_unlock (client->db_rp); } -void *svmdb_local_get_vec_variable (svmdb_client_t *client, char *var, - u32 elsize) +void * +svmdb_local_get_vec_variable (svmdb_client_t * client, char *var, u32 elsize) { - u8 *rv = 0; - u8 *copy = 0; + u8 *rv = 0; + u8 *copy = 0; - region_lock (client->db_rp, 17); + region_lock (client->db_rp, 17); - rv = local_get_variable_nolock (client, SVMDB_NAMESPACE_VEC, (u8 *) var); + rv = local_get_variable_nolock (client, SVMDB_NAMESPACE_VEC, (u8 *) var); - if (rv && vec_len(rv)) { - /* Make a copy in process-local memory */ - vec_alloc (copy, vec_len(rv)*elsize); - clib_memcpy (copy, rv, vec_len(rv)*elsize); - _vec_len(copy) = vec_len(rv); - region_unlock (client->db_rp); - return (copy); + if (rv && vec_len (rv)) + { + /* Make a copy in process-local memory */ + vec_alloc (copy, vec_len (rv) * elsize); + clib_memcpy (copy, rv, vec_len (rv) * elsize); + _vec_len (copy) = vec_len (rv); + region_unlock (client->db_rp); + return (copy); } - region_unlock (client->db_rp); - return (0); + region_unlock (client->db_rp); + return (0); } -void svmdb_local_dump_vecs (svmdb_client_t *client) +void +svmdb_local_dump_vecs (svmdb_client_t * client) { - uword *h; - u8 *key; - u32 value; - svmdb_shm_hdr_t *shm; - - region_lock (client->db_rp, 17); - shm = client->shm; + uword *h; + u8 *key; + u32 value; + svmdb_shm_hdr_t *shm; + + region_lock (client->db_rp, 17); + shm = client->shm; + + h = client->shm->namespaces[SVMDB_NAMESPACE_VEC]; + + /* *INDENT-OFF* */ + hash_foreach_mem(key, value, h, + ({ + svmdb_value_t *v = pool_elt_at_index (shm->values, value); + (void) fformat(stdout, "%s:\n %U (%.2f)\n", key, + format_hex_bytes, v->value, + vec_len(v->value)*v->elsize, ((f64 *)(v->value))[0]); + })); + /* *INDENT-ON* */ + + region_unlock (client->db_rp); +} - h = client->shm->namespaces [SVMDB_NAMESPACE_VEC]; +void * +svmdb_local_find_or_add_vec_variable (svmdb_client_t * client, + char *var, u32 nbytes) +{ + void *oldheap; + u8 *rv = 0; - hash_foreach_mem(key, value, h, - ({ - svmdb_value_t *v = pool_elt_at_index (shm->values, value); - (void) fformat(stdout, "%s:\n %U (%.2f)\n", key, - format_hex_bytes, v->value, - vec_len(v->value)*v->elsize, ((f64 *)(v->value))[0]); - })); + region_lock (client->db_rp, 18); + oldheap = svm_push_data_heap (client->db_rp); - region_unlock (client->db_rp); -} + rv = local_get_variable_nolock (client, SVMDB_NAMESPACE_VEC, (u8 *) var); -void *svmdb_local_find_or_add_vec_variable (svmdb_client_t *client, - char *var, u32 nbytes) -{ - void *oldheap; - u8 *rv = 0; - - region_lock (client->db_rp, 18); - oldheap = svm_push_data_heap (client->db_rp); - - rv = local_get_variable_nolock (client, SVMDB_NAMESPACE_VEC, (u8 *)var); - - if (rv) { - goto out; - } else { - uword *h; - u8 *name; - svmdb_shm_hdr_t * shm; - svmdb_value_t * newvalue; - - shm = client->shm; - h = shm->namespaces[SVMDB_NAMESPACE_VEC]; - - pool_get (shm->values, newvalue); - memset (newvalue, 0, sizeof (*newvalue)); - newvalue->elsize = 1; - vec_alloc (newvalue->value, nbytes); - _vec_len (newvalue->value) = nbytes; - name = format (0, "%s%c", var, 0); - hash_set_mem (h, name, newvalue - shm->values); - shm->namespaces[SVMDB_NAMESPACE_VEC] = h; - rv = newvalue->value; + if (rv) + { + goto out; + } + else + { + uword *h; + u8 *name; + svmdb_shm_hdr_t *shm; + svmdb_value_t *newvalue; + + shm = client->shm; + h = shm->namespaces[SVMDB_NAMESPACE_VEC]; + + pool_get (shm->values, newvalue); + memset (newvalue, 0, sizeof (*newvalue)); + newvalue->elsize = 1; + vec_alloc (newvalue->value, nbytes); + _vec_len (newvalue->value) = nbytes; + name = format (0, "%s%c", var, 0); + hash_set_mem (h, name, newvalue - shm->values); + shm->namespaces[SVMDB_NAMESPACE_VEC] = h; + rv = newvalue->value; } out: - svm_pop_heap(oldheap); - region_unlock (client->db_rp); - return (rv); + svm_pop_heap (oldheap); + region_unlock (client->db_rp); + return (rv); } + +/* + * fd.io coding-style-patch-verification: ON + * + * Local Variables: + * eval: (c-set-style "gnu") + * End: + */ diff --git a/svm/svmdb.h b/svm/svmdb.h index c5f59bbdd82..5f44b33280d 100644 --- a/svm/svmdb.h +++ b/svm/svmdb.h @@ -1,4 +1,4 @@ -/* +/* *------------------------------------------------------------------ * svmdb.h - shared VM database * @@ -22,60 +22,67 @@ #include "svm.h" -typedef enum { - SVMDB_ACTION_ILLEGAL=0, - SVMDB_ACTION_GET, /* not clear why anyone would care */ - SVMDB_ACTION_SET, - SVMDB_ACTION_UNSET, +typedef enum +{ + SVMDB_ACTION_ILLEGAL = 0, + SVMDB_ACTION_GET, /* not clear why anyone would care */ + SVMDB_ACTION_SET, + SVMDB_ACTION_UNSET, } svmdb_action_t; -typedef struct { - int pid; - int signum; - u32 action:4; - u32 opaque:28; +typedef struct +{ + int pid; + int signum; + u32 action:4; + u32 opaque:28; } svmdb_notify_t; -typedef struct { - u8 *value; - svmdb_notify_t *notifications; - u32 elsize; +typedef struct +{ + u8 *value; + svmdb_notify_t *notifications; + u32 elsize; } svmdb_value_t; -typedef enum { - SVMDB_NAMESPACE_STRING=0, - SVMDB_NAMESPACE_VEC, - SVMDB_N_NAMESPACES, +typedef enum +{ + SVMDB_NAMESPACE_STRING = 0, + SVMDB_NAMESPACE_VEC, + SVMDB_N_NAMESPACES, } svmdb_namespace_t; -typedef struct { - uword version; - /* pool of values */ - svmdb_value_t *values; - uword *namespaces [SVMDB_N_NAMESPACES]; +typedef struct +{ + uword version; + /* pool of values */ + svmdb_value_t *values; + uword *namespaces[SVMDB_N_NAMESPACES]; } svmdb_shm_hdr_t; #define SVMDB_SHM_VERSION 2 -typedef struct { - int flags; - int pid; - svm_region_t *db_rp; - svmdb_shm_hdr_t *shm; -} svmdb_client_t; - -typedef struct { - int add_del; - svmdb_namespace_t nspace; - char *var; - u32 elsize; - int signum; - u32 action:4; - u32 opaque:28; +typedef struct +{ + int flags; + int pid; + svm_region_t *db_rp; + svmdb_shm_hdr_t *shm; +} svmdb_client_t; + +typedef struct +{ + int add_del; + svmdb_namespace_t nspace; + char *var; + u32 elsize; + int signum; + u32 action:4; + u32 opaque:28; } svmdb_notification_args_t; -/* - * Must be a reasonable number, several mb smaller than +/* + * Must be a reasonable number, several mb smaller than * SVM_GLOBAL_REGION_SIZE, or no donut for you... */ #define SVMDB_DEFAULT_SIZE (4<<20) @@ -88,28 +95,35 @@ svmdb_client_t *svmdb_map_chroot (char *root_path); svmdb_client_t *svmdb_map_chroot_size (char *root_path, uword size); -void svmdb_unmap (svmdb_client_t *client); -void svmdb_local_unset_string_variable (svmdb_client_t *client, char *var); -void svmdb_local_set_string_variable (svmdb_client_t *client, - char *var, char *val); -char *svmdb_local_get_string_variable (svmdb_client_t *client, char *var); -void *svmdb_local_get_variable_reference (svmdb_client_t *client, - svmdb_namespace_t ns, - char *var); +void svmdb_unmap (svmdb_client_t * client); +void svmdb_local_unset_string_variable (svmdb_client_t * client, char *var); +void svmdb_local_set_string_variable (svmdb_client_t * client, + char *var, char *val); +char *svmdb_local_get_string_variable (svmdb_client_t * client, char *var); +void *svmdb_local_get_variable_reference (svmdb_client_t * client, + svmdb_namespace_t ns, char *var); -void svmdb_local_dump_strings (svmdb_client_t *client); +void svmdb_local_dump_strings (svmdb_client_t * client); -void svmdb_local_unset_vec_variable (svmdb_client_t *client, char *var); -void svmdb_local_set_vec_variable (svmdb_client_t *client, - char *var, void *val, u32 elsize); -void *svmdb_local_get_vec_variable (svmdb_client_t *client, char *var, - u32 elsize); -void svmdb_local_dump_vecs (svmdb_client_t *client); +void svmdb_local_unset_vec_variable (svmdb_client_t * client, char *var); +void svmdb_local_set_vec_variable (svmdb_client_t * client, + char *var, void *val, u32 elsize); +void *svmdb_local_get_vec_variable (svmdb_client_t * client, char *var, + u32 elsize); +void svmdb_local_dump_vecs (svmdb_client_t * client); -int svmdb_local_add_del_notification (svmdb_client_t *client, - svmdb_notification_args_t *args); +int svmdb_local_add_del_notification (svmdb_client_t * client, + svmdb_notification_args_t * args); -void *svmdb_local_find_or_add_vec_variable (svmdb_client_t *client, - char *var, u32 nbytes); +void *svmdb_local_find_or_add_vec_variable (svmdb_client_t * client, + char *var, u32 nbytes); #endif /* __included_svmdb_h__ */ + +/* + * fd.io coding-style-patch-verification: ON + * + * Local Variables: + * eval: (c-set-style "gnu") + * End: + */ diff --git a/svm/svmdbtool.c b/svm/svmdbtool.c index c2efbc52a34..cf475c4d1ba 100644 --- a/svm/svmdbtool.c +++ b/svm/svmdbtool.c @@ -38,289 +38,345 @@ #include <vppinfra/serialize.h> #include "svmdb.h" -static void get_string (char *chroot_path, u8 *vbl) +static void +get_string (char *chroot_path, u8 * vbl) { - svmdb_client_t *c; - char *rv; + svmdb_client_t *c; + char *rv; - c = svmdb_map_chroot(chroot_path); + c = svmdb_map_chroot (chroot_path); - rv = svmdb_local_get_string_variable (c, (char *)vbl); - - fformat(stdout, "%s\n", rv ? rv : "UNSET"); - vec_free(rv); - svmdb_unmap (c); + rv = svmdb_local_get_string_variable (c, (char *) vbl); + + fformat (stdout, "%s\n", rv ? rv : "UNSET"); + vec_free (rv); + svmdb_unmap (c); } -static void set_string (char *chroot_path, u8 *vbl, u8 *value) +static void +set_string (char *chroot_path, u8 * vbl, u8 * value) { - svmdb_client_t *c; + svmdb_client_t *c; - c = svmdb_map_chroot(chroot_path); - svmdb_local_set_string_variable (c, (char *)vbl, (char *)value); - svmdb_unmap (c); + c = svmdb_map_chroot (chroot_path); + svmdb_local_set_string_variable (c, (char *) vbl, (char *) value); + svmdb_unmap (c); } -static void unset_string (char *chroot_path, u8 *vbl) +static void +unset_string (char *chroot_path, u8 * vbl) { - svmdb_client_t *c; + svmdb_client_t *c; - c = svmdb_map_chroot(chroot_path); - svmdb_local_unset_string_variable (c, (char *)vbl); - svmdb_unmap (c); + c = svmdb_map_chroot (chroot_path); + svmdb_local_unset_string_variable (c, (char *) vbl); + svmdb_unmap (c); } -static void dump_strings(char *chroot_path) +static void +dump_strings (char *chroot_path) { - svmdb_client_t *c; + svmdb_client_t *c; - c = svmdb_map_chroot(chroot_path); - svmdb_local_dump_strings (c); - svmdb_unmap (c); + c = svmdb_map_chroot (chroot_path); + svmdb_local_dump_strings (c); + svmdb_unmap (c); } -static void test_vlib_vec_rate (char *chroot_path, f64 vr) +static void +test_vlib_vec_rate (char *chroot_path, f64 vr) { - svmdb_client_t *c; - f64 *tv = 0; + svmdb_client_t *c; + f64 *tv = 0; - vec_add1 (tv, vr); + vec_add1 (tv, vr); - c = svmdb_map_chroot(chroot_path); + c = svmdb_map_chroot (chroot_path); - svmdb_local_set_vec_variable (c, "vlib_vector_rate", (char *)tv, sizeof (*tv)); - svmdb_unmap (c); + svmdb_local_set_vec_variable (c, "vlib_vector_rate", (char *) tv, + sizeof (*tv)); + svmdb_unmap (c); - vec_free(tv); + vec_free (tv); } -static void test_vec (char *chroot_path, u8 *vbl) +static void +test_vec (char *chroot_path, u8 * vbl) { - svmdb_client_t *c; - u64 *tv = 0; - int i; - - /* my amp goes to 11 */ - for (i = 0; i < 11; i++) { - vec_add1(tv, i); + svmdb_client_t *c; + u64 *tv = 0; + int i; + + /* my amp goes to 11 */ + for (i = 0; i < 11; i++) + { + vec_add1 (tv, i); } - c = svmdb_map_chroot(chroot_path); - svmdb_local_set_vec_variable (c, (char *)vbl, (char *)tv, sizeof (tv[0])); - svmdb_unmap (c); + c = svmdb_map_chroot (chroot_path); + svmdb_local_set_vec_variable (c, (char *) vbl, (char *) tv, sizeof (tv[0])); + svmdb_unmap (c); - vec_free(tv); + vec_free (tv); } -static void fake_install (char *chroot_path, u8 *add_value) +static void +fake_install (char *chroot_path, u8 * add_value) { - svmdb_client_t *c; - u8 *v = 0; - u8 **values = 0; - u8 *oldvalue; - u8 *value; - int nitems = 0, i; - serialize_main_t m; - - c = svmdb_map_chroot(chroot_path); - - oldvalue = svmdb_local_get_vec_variable (c, "installed_sw", 1); - if (oldvalue) { - unserialize_open_data (&m, oldvalue, vec_len (oldvalue)); - nitems = unserialize_likely_small_unsigned_integer (&m); - for (i = 0; i < nitems; i++) { - unserialize_cstring (&m, (char **)&value); - vec_add1 (values, value); - } - vec_free (v); + svmdb_client_t *c; + u8 *v = 0; + u8 **values = 0; + u8 *oldvalue; + u8 *value; + int nitems = 0, i; + serialize_main_t m; + + c = svmdb_map_chroot (chroot_path); + + oldvalue = svmdb_local_get_vec_variable (c, "installed_sw", 1); + if (oldvalue) + { + unserialize_open_data (&m, oldvalue, vec_len (oldvalue)); + nitems = unserialize_likely_small_unsigned_integer (&m); + for (i = 0; i < nitems; i++) + { + unserialize_cstring (&m, (char **) &value); + vec_add1 (values, value); + } + vec_free (v); } - nitems++; - value = format (0, "%s%c", add_value, 0); + nitems++; + value = format (0, "%s%c", add_value, 0); - vec_add1 (values, value); + vec_add1 (values, value); - fformat (stdout, "Resulting installed_sw vector:\n"); + fformat (stdout, "Resulting installed_sw vector:\n"); - serialize_open_vector (&m, v); - serialize_likely_small_unsigned_integer (&m, vec_len (values)); - for (i = 0; i < vec_len (values); i++) { - fformat (stdout, "%s\n", values[i]); - serialize_cstring (&m, (char *)values[i]); + serialize_open_vector (&m, v); + serialize_likely_small_unsigned_integer (&m, vec_len (values)); + for (i = 0; i < vec_len (values); i++) + { + fformat (stdout, "%s\n", values[i]); + serialize_cstring (&m, (char *) values[i]); } - v = serialize_close_vector (&m); + v = serialize_close_vector (&m); - svmdb_local_set_vec_variable (c, "installed_sw", v, sizeof (v[0])); - svmdb_unmap (c); + svmdb_local_set_vec_variable (c, "installed_sw", v, sizeof (v[0])); + svmdb_unmap (c); - for (i = 0; i < vec_len (values); i++) - vec_free (values[i]); - vec_free (values); + for (i = 0; i < vec_len (values); i++) + vec_free (values[i]); + vec_free (values); } -static void sigaction_handler (int signum, siginfo_t *i, void *notused) +static void +sigaction_handler (int signum, siginfo_t * i, void *notused) { - u32 action, opaque; + u32 action, opaque; - action = (u32)(uword) i->si_ptr; - action >>= 28; - opaque = (u32)(uword) i->si_ptr; - opaque &= ~(0xF0000000); + action = (u32) (uword) i->si_ptr; + action >>= 28; + opaque = (u32) (uword) i->si_ptr; + opaque &= ~(0xF0000000); - clib_warning ("signal %d, action %d, opaque %x", - signum, action, opaque); + clib_warning ("signal %d, action %d, opaque %x", signum, action, opaque); } -static void test_reg (char *chroot_path, u8 *vbl) +static void +test_reg (char *chroot_path, u8 * vbl) { - svmdb_client_t *c; - svmdb_notification_args_t args; - svmdb_notification_args_t *a = &args; - struct sigaction sa; - - memset (&sa, 0, sizeof (sa)); - sa.sa_sigaction = sigaction_handler; - sa.sa_flags = SA_SIGINFO; - if (sigaction (SIGUSR2, &sa, 0) < 0) { - clib_unix_warning ("sigaction"); - return; + svmdb_client_t *c; + svmdb_notification_args_t args; + svmdb_notification_args_t *a = &args; + struct sigaction sa; + + memset (&sa, 0, sizeof (sa)); + sa.sa_sigaction = sigaction_handler; + sa.sa_flags = SA_SIGINFO; + if (sigaction (SIGUSR2, &sa, 0) < 0) + { + clib_unix_warning ("sigaction"); + return; } - memset (a, 0, sizeof (*a)); + memset (a, 0, sizeof (*a)); + + c = svmdb_map_chroot (chroot_path); - c = svmdb_map_chroot(chroot_path); + a->add_del = 1 /* add */ ; + a->nspace = SVMDB_NAMESPACE_STRING; + a->var = (char *) vbl; + a->elsize = 1; + a->signum = SIGUSR2; + a->action = SVMDB_ACTION_GET; + a->opaque = 0x0eadbeef; - a->add_del = 1 /* add */; - a->nspace = SVMDB_NAMESPACE_STRING; - a->var = (char *) vbl; - a->elsize = 1; - a->signum = SIGUSR2; - a->action = SVMDB_ACTION_GET; - a->opaque = 0x0eadbeef; + svmdb_local_add_del_notification (c, a); - svmdb_local_add_del_notification (c, a); + (void) svmdb_local_get_string_variable (c, (char *) vbl); - (void) svmdb_local_get_string_variable (c, (char *)vbl); + a->add_del = 0; /* del */ + svmdb_local_add_del_notification (c, a); - a->add_del = 0; /* del */ - svmdb_local_add_del_notification (c, a); - - - svmdb_unmap (c); + + svmdb_unmap (c); } -static void unset_vec (char *chroot_path, u8 *vbl) +static void +unset_vec (char *chroot_path, u8 * vbl) { - svmdb_client_t *c; + svmdb_client_t *c; - c = svmdb_map_chroot(chroot_path); - svmdb_local_unset_vec_variable (c, (char *)vbl); - svmdb_unmap (c); + c = svmdb_map_chroot (chroot_path); + svmdb_local_unset_vec_variable (c, (char *) vbl); + svmdb_unmap (c); } -static void dump_vecs(char *chroot_path) +static void +dump_vecs (char *chroot_path) { - svmdb_client_t *c; + svmdb_client_t *c; - c = svmdb_map_chroot(chroot_path); - svmdb_local_dump_vecs (c); - svmdb_unmap (c); + c = svmdb_map_chroot (chroot_path); + svmdb_local_dump_vecs (c); + svmdb_unmap (c); } -static void crash_test(char *chroot_path) +static void +crash_test (char *chroot_path) { - svmdb_client_t *c; + svmdb_client_t *c; - c = svmdb_map_chroot(chroot_path); + c = svmdb_map_chroot (chroot_path); - clib_warning ("Grab region mutex and crash deliberately!"); - c->db_rp->mutex_owner_pid = getpid(); - c->db_rp->mutex_owner_tag = -13; - pthread_mutex_lock(&c->db_rp->mutex); + clib_warning ("Grab region mutex and crash deliberately!"); + c->db_rp->mutex_owner_pid = getpid (); + c->db_rp->mutex_owner_tag = -13; + pthread_mutex_lock (&c->db_rp->mutex); - abort(); + abort (); } -static void map_with_size (char *chroot_path, uword size) +static void +map_with_size (char *chroot_path, uword size) { - svmdb_client_t *c; - c = svmdb_map_chroot_size (chroot_path, size); - svmdb_unmap (c); + svmdb_client_t *c; + c = svmdb_map_chroot_size (chroot_path, size); + svmdb_unmap (c); } -int main (int argc, char **argv) +int +main (int argc, char **argv) { - unformat_input_t input; - int parsed =0; - u8 *vbl=0, *value=0; - char *chroot_path = 0; - u8 *chroot_path_u8; - uword size; - f64 vr; - - unformat_init_command_line (&input, argv); - - while (unformat_check_input (&input) != UNFORMAT_END_OF_INPUT) { - if (unformat (&input, "get-string %s", &vbl)) { - get_string (chroot_path, vbl); - vec_free(vbl); - parsed++; - } else if (unformat (&input, "set-string %s %s", &vbl, &value)) { - set_string (chroot_path, vbl, value); - vec_free(vbl); - vec_free(value); - parsed++; - } else if (unformat(&input, "unset-string %s", &vbl)) { - unset_string (chroot_path, vbl); - vec_free(vbl); - parsed++; - } else if (unformat(&input, "dump-strings")) { - dump_strings(chroot_path); - parsed++; - } else if (unformat(&input, "unset-vec %s", &vbl)) { - unset_vec (chroot_path, vbl); - vec_free(vbl); - parsed++; - } else if (unformat(&input, "dump-vecs")) { - dump_vecs(chroot_path); - parsed++; - } else if (unformat (&input, "test-vec %s", &vbl)) { - test_vec(chroot_path, vbl); - // vec_free(vbl); - parsed++; - } else if (unformat (&input, "vlib-vec-rate %f", &vr)) { - test_vlib_vec_rate(chroot_path, vr); - parsed++; - } else if (unformat (&input, "test-reg %s", &vbl)) { - test_reg(chroot_path, vbl); - parsed++; - } else if (unformat (&input, "crash-test")) { - crash_test (chroot_path); - } else if (unformat (&input, "chroot %s", &chroot_path_u8)) { - chroot_path = (char *) chroot_path_u8; - } else if (unformat (&input, "fake-install %s", &value)) { - fake_install (chroot_path, value); - parsed++; - } else if (unformat (&input, "size %d", &size)) { - map_with_size (chroot_path, size); - parsed++; - } else { - break; - } + unformat_input_t input; + int parsed = 0; + u8 *vbl = 0, *value = 0; + char *chroot_path = 0; + u8 *chroot_path_u8; + uword size; + f64 vr; + + unformat_init_command_line (&input, argv); + + while (unformat_check_input (&input) != UNFORMAT_END_OF_INPUT) + { + if (unformat (&input, "get-string %s", &vbl)) + { + get_string (chroot_path, vbl); + vec_free (vbl); + parsed++; + } + else if (unformat (&input, "set-string %s %s", &vbl, &value)) + { + set_string (chroot_path, vbl, value); + vec_free (vbl); + vec_free (value); + parsed++; + } + else if (unformat (&input, "unset-string %s", &vbl)) + { + unset_string (chroot_path, vbl); + vec_free (vbl); + parsed++; + } + else if (unformat (&input, "dump-strings")) + { + dump_strings (chroot_path); + parsed++; + } + else if (unformat (&input, "unset-vec %s", &vbl)) + { + unset_vec (chroot_path, vbl); + vec_free (vbl); + parsed++; + } + else if (unformat (&input, "dump-vecs")) + { + dump_vecs (chroot_path); + parsed++; + } + else if (unformat (&input, "test-vec %s", &vbl)) + { + test_vec (chroot_path, vbl); + // vec_free(vbl); + parsed++; + } + else if (unformat (&input, "vlib-vec-rate %f", &vr)) + { + test_vlib_vec_rate (chroot_path, vr); + parsed++; + } + else if (unformat (&input, "test-reg %s", &vbl)) + { + test_reg (chroot_path, vbl); + parsed++; + } + else if (unformat (&input, "crash-test")) + { + crash_test (chroot_path); + } + else if (unformat (&input, "chroot %s", &chroot_path_u8)) + { + chroot_path = (char *) chroot_path_u8; + } + else if (unformat (&input, "fake-install %s", &value)) + { + fake_install (chroot_path, value); + parsed++; + } + else if (unformat (&input, "size %d", &size)) + { + map_with_size (chroot_path, size); + parsed++; + } + else + { + break; + } } - unformat_free (&input); + unformat_free (&input); - if (!parsed) { - fformat(stdout, "%s: get-string <name> | set-string <name> <value>\n", - argv[0]); - fformat(stdout, " unset-string <name> | dump-strings\n"); - fformat(stdout, " test-vec <name> |\n"); - fformat(stdout, " unset-vec <name> | dump-vecs\n"); + if (!parsed) + { + fformat (stdout, "%s: get-string <name> | set-string <name> <value>\n", + argv[0]); + fformat (stdout, " unset-string <name> | dump-strings\n"); + fformat (stdout, " test-vec <name> |\n"); + fformat (stdout, " unset-vec <name> | dump-vecs\n"); } - - exit (0); + + exit (0); } + +/* + * fd.io coding-style-patch-verification: ON + * + * Local Variables: + * eval: (c-set-style "gnu") + * End: + */ diff --git a/svm/svmtool.c b/svm/svmtool.c index e87746110ae..c37afbd152c 100644 --- a/svm/svmtool.c +++ b/svm/svmtool.c @@ -1,6 +1,6 @@ -/* +/* *------------------------------------------------------------------ - * svmtool.c + * svmtool.c * * Copyright (c) 2009 Cisco and/or its affiliates. * Licensed under the Apache License, Version 2.0 (the "License"); @@ -48,417 +48,479 @@ * format_all_svm_regions * Maps / unmaps regions. Do NOT call from client code! */ -u8 *format_all_svm_regions (u8 *s, va_list * args) +u8 * +format_all_svm_regions (u8 * s, va_list * args) { - int verbose = va_arg (*args, int); - svm_region_t *root_rp = svm_get_root_rp(); - svm_main_region_t *mp; - svm_subregion_t *subp; - svm_region_t *rp; - svm_map_region_args_t *a = 0; - u8 ** svm_names=0; - u8 *name=0; - int i; - - ASSERT(root_rp); - - pthread_mutex_lock (&root_rp->mutex); - - s = format (s, "%U", format_svm_region, root_rp, verbose); - - mp = root_rp->data_base; - - /* - * Snapshoot names, can't hold root rp mutex across - * find_or_create. - */ - pool_foreach (subp, mp->subregions, ({ - name = vec_dup (subp->subregion_name); - vec_add1(svm_names, name); - })); - - pthread_mutex_unlock (&root_rp->mutex); - - for (i = 0; i < vec_len(svm_names); i++) { - vec_validate(a, 0); - a->name = (char *) svm_names[i]; - rp = svm_region_find_or_create (a); - if (rp) { - pthread_mutex_lock (&rp->mutex); - s = format (s, "%U", format_svm_region, rp, verbose); - pthread_mutex_unlock (&rp->mutex); - svm_region_unmap (rp); - vec_free(svm_names[i]); - } - vec_free (a); + int verbose = va_arg (*args, int); + svm_region_t *root_rp = svm_get_root_rp (); + svm_main_region_t *mp; + svm_subregion_t *subp; + svm_region_t *rp; + svm_map_region_args_t *a = 0; + u8 **svm_names = 0; + u8 *name = 0; + int i; + + ASSERT (root_rp); + + pthread_mutex_lock (&root_rp->mutex); + + s = format (s, "%U", format_svm_region, root_rp, verbose); + + mp = root_rp->data_base; + + /* + * Snapshoot names, can't hold root rp mutex across + * find_or_create. + */ + /* *INDENT-OFF* */ + pool_foreach (subp, mp->subregions, ({ + name = vec_dup (subp->subregion_name); + vec_add1(svm_names, name); + })); + /* *INDENT-ON* */ + + pthread_mutex_unlock (&root_rp->mutex); + + for (i = 0; i < vec_len (svm_names); i++) + { + vec_validate (a, 0); + a->name = (char *) svm_names[i]; + rp = svm_region_find_or_create (a); + if (rp) + { + pthread_mutex_lock (&rp->mutex); + s = format (s, "%U", format_svm_region, rp, verbose); + pthread_mutex_unlock (&rp->mutex); + svm_region_unmap (rp); + vec_free (svm_names[i]); + } + vec_free (a); } - vec_free(svm_names); - return (s); + vec_free (svm_names); + return (s); } -void show (char *chroot_path, int verbose) +void +show (char *chroot_path, int verbose) { - svm_map_region_args_t *a = 0; + svm_map_region_args_t *a = 0; - vec_validate (a, 0); + vec_validate (a, 0); - svm_region_init_chroot(chroot_path); + svm_region_init_chroot (chroot_path); - fformat(stdout, "My pid is %d\n", getpid()); + fformat (stdout, "My pid is %d\n", getpid ()); - fformat(stdout, "%U", format_all_svm_regions, verbose); + fformat (stdout, "%U", format_all_svm_regions, verbose); - svm_region_exit (); + svm_region_exit (); - vec_free (a); + vec_free (a); } -static void *svm_map_region_nolock (svm_map_region_args_t *a) +static void * +svm_map_region_nolock (svm_map_region_args_t * a) { - int svm_fd; - svm_region_t *rp; - int deadman=0; - u8 *shm_name; + int svm_fd; + svm_region_t *rp; + int deadman = 0; + u8 *shm_name; - ASSERT((a->size & ~(MMAP_PAGESIZE-1)) == a->size); + ASSERT ((a->size & ~(MMAP_PAGESIZE - 1)) == a->size); - shm_name = shm_name_from_svm_map_region_args (a); + shm_name = shm_name_from_svm_map_region_args (a); - svm_fd = shm_open((char *)shm_name, O_RDWR, 0777); + svm_fd = shm_open ((char *) shm_name, O_RDWR, 0777); - if (svm_fd < 0) { - perror("svm_region_map(mmap open)"); - return (0); + if (svm_fd < 0) + { + perror ("svm_region_map(mmap open)"); + return (0); } - vec_free (shm_name); - - rp = mmap(0, MMAP_PAGESIZE, - PROT_READ | PROT_WRITE, MAP_SHARED, svm_fd, 0); - - if (rp == (svm_region_t *) MAP_FAILED) { - close(svm_fd); - clib_warning("mmap"); - return (0); + vec_free (shm_name); + + rp = mmap (0, MMAP_PAGESIZE, PROT_READ | PROT_WRITE, MAP_SHARED, svm_fd, 0); + + if (rp == (svm_region_t *) MAP_FAILED) + { + close (svm_fd); + clib_warning ("mmap"); + return (0); } - /* - * We lost the footrace to create this region; make sure - * the winner has crossed the finish line. - */ - while (rp->version == 0 && deadman++ < 5) { - sleep(1); + /* + * We lost the footrace to create this region; make sure + * the winner has crossed the finish line. + */ + while (rp->version == 0 && deadman++ < 5) + { + sleep (1); } - /* - * <bleep>-ed? - */ - if (rp->version == 0) { - clib_warning("rp->version %d not %d", rp->version, - SVM_VERSION); - return (0); - } - /* Remap now that the region has been placed */ - a->baseva = rp->virtual_base; - a->size = rp->virtual_size; - munmap(rp, MMAP_PAGESIZE); - - rp = (void *) mmap ((void *)a->baseva, a->size, - PROT_READ | PROT_WRITE, - MAP_SHARED | MAP_FIXED, svm_fd, 0); - if ((uword)rp == (uword)MAP_FAILED) { - clib_unix_warning ("mmap"); - return (0); + /* + * <bleep>-ed? + */ + if (rp->version == 0) + { + clib_warning ("rp->version %d not %d", rp->version, SVM_VERSION); + return (0); } - - if ((uword) rp != rp->virtual_base) { - clib_warning("mmap botch"); + /* Remap now that the region has been placed */ + a->baseva = rp->virtual_base; + a->size = rp->virtual_size; + munmap (rp, MMAP_PAGESIZE); + + rp = (void *) mmap ((void *) a->baseva, a->size, + PROT_READ | PROT_WRITE, + MAP_SHARED | MAP_FIXED, svm_fd, 0); + if ((uword) rp == (uword) MAP_FAILED) + { + clib_unix_warning ("mmap"); + return (0); } - - if (pthread_mutex_trylock(&rp->mutex)) { - clib_warning ("rp->mutex LOCKED by pid %d, tag %d, cleared...", - rp->mutex_owner_pid, rp->mutex_owner_tag); - memset(&rp->mutex, 0, sizeof (rp->mutex)); - - } else { - clib_warning ("mutex OK...\n"); - pthread_mutex_unlock(&rp->mutex); + + if ((uword) rp != rp->virtual_base) + { + clib_warning ("mmap botch"); } - return ((void *) rp); + if (pthread_mutex_trylock (&rp->mutex)) + { + clib_warning ("rp->mutex LOCKED by pid %d, tag %d, cleared...", + rp->mutex_owner_pid, rp->mutex_owner_tag); + memset (&rp->mutex, 0, sizeof (rp->mutex)); + + } + else + { + clib_warning ("mutex OK...\n"); + pthread_mutex_unlock (&rp->mutex); + } + + return ((void *) rp); } /* * rnd_pagesize * Round to a pagesize multiple, presumably 4k works */ -static unsigned int rnd_pagesize(unsigned int size) +static unsigned int +rnd_pagesize (unsigned int size) { - unsigned int rv; + unsigned int rv; - rv = (size + (MMAP_PAGESIZE-1)) & ~(MMAP_PAGESIZE-1); - return(rv); + rv = (size + (MMAP_PAGESIZE - 1)) & ~(MMAP_PAGESIZE - 1); + return (rv); } #define MUTEX_DEBUG -always_inline void region_lock(svm_region_t *rp, int tag) +always_inline void +region_lock (svm_region_t * rp, int tag) { - pthread_mutex_lock(&rp->mutex); + pthread_mutex_lock (&rp->mutex); #ifdef MUTEX_DEBUG - rp->mutex_owner_pid = getpid(); - rp->mutex_owner_tag = tag; -#endif + rp->mutex_owner_pid = getpid (); + rp->mutex_owner_tag = tag; +#endif } -always_inline void region_unlock(svm_region_t *rp) +always_inline void +region_unlock (svm_region_t * rp) { #ifdef MUTEX_DEBUG - rp->mutex_owner_pid = 0; - rp->mutex_owner_tag = 0; -#endif - pthread_mutex_unlock(&rp->mutex); + rp->mutex_owner_pid = 0; + rp->mutex_owner_tag = 0; +#endif + pthread_mutex_unlock (&rp->mutex); } -static void *svm_existing_region_map_nolock (void *root_arg, - svm_map_region_args_t *a) +static void * +svm_existing_region_map_nolock (void *root_arg, svm_map_region_args_t * a) { - svm_region_t *root_rp = root_arg; - svm_main_region_t *mp; - svm_region_t *rp; - void *oldheap; - uword *p; - - a->size += MMAP_PAGESIZE + SVM_PVT_MHEAP_SIZE; - a->size = rnd_pagesize(a->size); - - region_lock (root_rp, 4); - oldheap = svm_push_pvt_heap(root_rp); - mp = root_rp->data_base; - - ASSERT(mp); - - p = hash_get_mem (mp->name_hash, a->name); - - if (p) { - rp = svm_map_region_nolock (a); - region_unlock(root_rp); - svm_pop_heap (oldheap); - return rp; + svm_region_t *root_rp = root_arg; + svm_main_region_t *mp; + svm_region_t *rp; + void *oldheap; + uword *p; + + a->size += MMAP_PAGESIZE + SVM_PVT_MHEAP_SIZE; + a->size = rnd_pagesize (a->size); + + region_lock (root_rp, 4); + oldheap = svm_push_pvt_heap (root_rp); + mp = root_rp->data_base; + + ASSERT (mp); + + p = hash_get_mem (mp->name_hash, a->name); + + if (p) + { + rp = svm_map_region_nolock (a); + region_unlock (root_rp); + svm_pop_heap (oldheap); + return rp; } - return 0; + return 0; } -static void trace (char *chroot_path, char *name, int enable_disable) +static void +trace (char *chroot_path, char *name, int enable_disable) { - svm_map_region_args_t *a = 0; - svm_region_t *db_rp; - void *oldheap; - - vec_validate (a, 0); - - svm_region_init_chroot(chroot_path); - - a->name = name; - a->size = 1<<20; - a->flags = SVM_FLAGS_MHEAP; - - db_rp = svm_region_find_or_create (a); - - ASSERT(db_rp); - - region_lock (db_rp, 20); - - oldheap = svm_push_data_heap (db_rp); - - mheap_trace (db_rp->data_heap, enable_disable); - - svm_pop_heap (oldheap); - region_unlock (db_rp); - - svm_region_unmap ((void *)db_rp); - svm_region_exit (); - vec_free (a); + svm_map_region_args_t *a = 0; + svm_region_t *db_rp; + void *oldheap; + + vec_validate (a, 0); + + svm_region_init_chroot (chroot_path); + + a->name = name; + a->size = 1 << 20; + a->flags = SVM_FLAGS_MHEAP; + + db_rp = svm_region_find_or_create (a); + + ASSERT (db_rp); + + region_lock (db_rp, 20); + + oldheap = svm_push_data_heap (db_rp); + + mheap_trace (db_rp->data_heap, enable_disable); + + svm_pop_heap (oldheap); + region_unlock (db_rp); + + svm_region_unmap ((void *) db_rp); + svm_region_exit (); + vec_free (a); } -static void subregion_repair(char *chroot_path) +static void +subregion_repair (char *chroot_path) { - int i; - svm_main_region_t *mp; - svm_map_region_args_t a; - svm_region_t *root_rp; - svm_region_t *rp; - svm_subregion_t *subp; - u8 *name=0; - u8 ** svm_names=0; - - svm_region_init_chroot(chroot_path); - root_rp = svm_get_root_rp(); - - pthread_mutex_lock (&root_rp->mutex); - - mp = root_rp->data_base; - - /* - * Snapshoot names, can't hold root rp mutex across - * find_or_create. - */ - pool_foreach (subp, mp->subregions, ({ - name = vec_dup (subp->subregion_name); - vec_add1(svm_names, name); - })); - - pthread_mutex_unlock (&root_rp->mutex); - - for (i = 0; i < vec_len(svm_names); i++) { - memset (&a, 0, sizeof (a)); - a.root_path = chroot_path; - a.name = (char *) svm_names[i]; - fformat(stdout, "Checking %s region...\n", - a.name); - rp = svm_existing_region_map_nolock (root_rp, &a); - if (rp) { - svm_region_unmap (rp); - vec_free(svm_names[i]); - } + int i; + svm_main_region_t *mp; + svm_map_region_args_t a; + svm_region_t *root_rp; + svm_region_t *rp; + svm_subregion_t *subp; + u8 *name = 0; + u8 **svm_names = 0; + + svm_region_init_chroot (chroot_path); + root_rp = svm_get_root_rp (); + + pthread_mutex_lock (&root_rp->mutex); + + mp = root_rp->data_base; + + /* + * Snapshoot names, can't hold root rp mutex across + * find_or_create. + */ + /* *INDENT-OFF* */ + pool_foreach (subp, mp->subregions, ({ + name = vec_dup (subp->subregion_name); + vec_add1(svm_names, name); + })); + /* *INDENT-ON* */ + + pthread_mutex_unlock (&root_rp->mutex); + + for (i = 0; i < vec_len (svm_names); i++) + { + memset (&a, 0, sizeof (a)); + a.root_path = chroot_path; + a.name = (char *) svm_names[i]; + fformat (stdout, "Checking %s region...\n", a.name); + rp = svm_existing_region_map_nolock (root_rp, &a); + if (rp) + { + svm_region_unmap (rp); + vec_free (svm_names[i]); + } } - vec_free(svm_names); + vec_free (svm_names); } -void repair (char *chroot_path, int crash_root_region) +void +repair (char *chroot_path, int crash_root_region) { - svm_region_t *root_rp = 0; - svm_map_region_args_t *a = 0; - void *svm_map_region (svm_map_region_args_t *a); - int svm_fd; - u8 *shm_name; + svm_region_t *root_rp = 0; + svm_map_region_args_t *a = 0; + void *svm_map_region (svm_map_region_args_t * a); + int svm_fd; + u8 *shm_name; - fformat(stdout, "our pid: %d\n", getpid()); + fformat (stdout, "our pid: %d\n", getpid ()); - vec_validate (a, 0); + vec_validate (a, 0); - a->root_path = chroot_path; - a->name = SVM_GLOBAL_REGION_NAME; - a->baseva = SVM_GLOBAL_REGION_BASEVA; - a->size = SVM_GLOBAL_REGION_SIZE; - a->flags = SVM_FLAGS_NODATA; + a->root_path = chroot_path; + a->name = SVM_GLOBAL_REGION_NAME; + a->baseva = SVM_GLOBAL_REGION_BASEVA; + a->size = SVM_GLOBAL_REGION_SIZE; + a->flags = SVM_FLAGS_NODATA; - shm_name = shm_name_from_svm_map_region_args (a); + shm_name = shm_name_from_svm_map_region_args (a); - svm_fd = shm_open ((char *)shm_name, O_RDWR, 0777); + svm_fd = shm_open ((char *) shm_name, O_RDWR, 0777); - if (svm_fd < 0) { - perror("svm_region_map(mmap open)"); - goto out; + if (svm_fd < 0) + { + perror ("svm_region_map(mmap open)"); + goto out; } - vec_free(shm_name); + vec_free (shm_name); - root_rp = mmap(0, MMAP_PAGESIZE, - PROT_READ | PROT_WRITE, MAP_SHARED, svm_fd, 0); - - if (root_rp == (svm_region_t *) MAP_FAILED) { - close(svm_fd); - clib_warning("mmap"); - goto out; + root_rp = mmap (0, MMAP_PAGESIZE, + PROT_READ | PROT_WRITE, MAP_SHARED, svm_fd, 0); + + if (root_rp == (svm_region_t *) MAP_FAILED) + { + close (svm_fd); + clib_warning ("mmap"); + goto out; } - - /* Remap now that the region has been placed */ - clib_warning ("remap to 0x%x", root_rp->virtual_base); - - a->baseva = root_rp->virtual_base; - a->size = root_rp->virtual_size; - munmap(root_rp, MMAP_PAGESIZE); - - root_rp = (void *) mmap ((void *)a->baseva, a->size, - PROT_READ | PROT_WRITE, - MAP_SHARED | MAP_FIXED, svm_fd, 0); - if ((uword)root_rp == (uword)MAP_FAILED) { - clib_unix_warning ("mmap"); - goto out; + + /* Remap now that the region has been placed */ + clib_warning ("remap to 0x%x", root_rp->virtual_base); + + a->baseva = root_rp->virtual_base; + a->size = root_rp->virtual_size; + munmap (root_rp, MMAP_PAGESIZE); + + root_rp = (void *) mmap ((void *) a->baseva, a->size, + PROT_READ | PROT_WRITE, + MAP_SHARED | MAP_FIXED, svm_fd, 0); + if ((uword) root_rp == (uword) MAP_FAILED) + { + clib_unix_warning ("mmap"); + goto out; } - - close(svm_fd); - if ((uword) root_rp != root_rp->virtual_base) { - clib_warning("mmap botch"); - goto out; + close (svm_fd); + + if ((uword) root_rp != root_rp->virtual_base) + { + clib_warning ("mmap botch"); + goto out; + } + + if (pthread_mutex_trylock (&root_rp->mutex)) + { + clib_warning ("root_rp->mutex LOCKED by pid %d, tag %d, cleared...", + root_rp->mutex_owner_pid, root_rp->mutex_owner_tag); + memset (&root_rp->mutex, 0, sizeof (root_rp->mutex)); + goto out; } - - if (pthread_mutex_trylock(&root_rp->mutex)) { - clib_warning ("root_rp->mutex LOCKED by pid %d, tag %d, cleared...", - root_rp->mutex_owner_pid, root_rp->mutex_owner_tag); - memset(&root_rp->mutex, 0, sizeof (root_rp->mutex)); - goto out; - } else { - clib_warning ("root_rp->mutex OK...\n"); - pthread_mutex_unlock(&root_rp->mutex); + else + { + clib_warning ("root_rp->mutex OK...\n"); + pthread_mutex_unlock (&root_rp->mutex); } - - out: - vec_free (a); - /* - * Now that the root region is known to be OK, - * fix broken subregions - */ - subregion_repair(chroot_path); - - if (crash_root_region) { - clib_warning ("Leaving root region locked on purpose..."); - pthread_mutex_lock(&root_rp->mutex); - root_rp->mutex_owner_pid = getpid(); - root_rp->mutex_owner_tag = 99; + +out: + vec_free (a); + /* + * Now that the root region is known to be OK, + * fix broken subregions + */ + subregion_repair (chroot_path); + + if (crash_root_region) + { + clib_warning ("Leaving root region locked on purpose..."); + pthread_mutex_lock (&root_rp->mutex); + root_rp->mutex_owner_pid = getpid (); + root_rp->mutex_owner_tag = 99; } - svm_region_exit (); + svm_region_exit (); } -int main (int argc, char **argv) +int +main (int argc, char **argv) { - unformat_input_t input; - int parsed =0; - char *name; - char *chroot_path = 0; - u8 *chroot_u8; - - unformat_init_command_line (&input, argv); - - while (unformat_check_input (&input) != UNFORMAT_END_OF_INPUT) { - if (unformat(&input, "show-verbose")) { - show (chroot_path, 1); - parsed++; - } else if (unformat (&input, "show")) { - show (chroot_path, 0); - parsed++; - } else if (unformat (&input, "client-scan")) { - svm_client_scan(chroot_path); - parsed++; - } else if (unformat (&input, "repair")) { - repair(chroot_path, 0 /* fix it */); - parsed++; - } else if (unformat (&input, "crash")) { - repair (chroot_path, 1 /* crash it */); - parsed++; - } else if (unformat (&input, "trace-on %s", &name)) { - trace (chroot_path, name, 1); - parsed++; - } else if (unformat (&input, "trace-off %s", &name)) { - trace (chroot_path, name, 0); - parsed++; - } else if (unformat (&input, "chroot %s", &chroot_u8)) { - chroot_path = (char *) chroot_u8; - } else { - break; - } + unformat_input_t input; + int parsed = 0; + char *name; + char *chroot_path = 0; + u8 *chroot_u8; + + unformat_init_command_line (&input, argv); + + while (unformat_check_input (&input) != UNFORMAT_END_OF_INPUT) + { + if (unformat (&input, "show-verbose")) + { + show (chroot_path, 1); + parsed++; + } + else if (unformat (&input, "show")) + { + show (chroot_path, 0); + parsed++; + } + else if (unformat (&input, "client-scan")) + { + svm_client_scan (chroot_path); + parsed++; + } + else if (unformat (&input, "repair")) + { + repair (chroot_path, 0 /* fix it */ ); + parsed++; + } + else if (unformat (&input, "crash")) + { + repair (chroot_path, 1 /* crash it */ ); + parsed++; + } + else if (unformat (&input, "trace-on %s", &name)) + { + trace (chroot_path, name, 1); + parsed++; + } + else if (unformat (&input, "trace-off %s", &name)) + { + trace (chroot_path, name, 0); + parsed++; + } + else if (unformat (&input, "chroot %s", &chroot_u8)) + { + chroot_path = (char *) chroot_u8; + } + else + { + break; + } } - unformat_free (&input); + unformat_free (&input); - if (!parsed) { - fformat(stdout, "%s: show | show-verbose | client-scan | trace-on <region-name>\n", argv[0]); - fformat(stdout, " trace-off <region-name>\n"); + if (!parsed) + { + fformat (stdout, + "%s: show | show-verbose | client-scan | trace-on <region-name>\n", + argv[0]); + fformat (stdout, " trace-off <region-name>\n"); } - exit (0); + exit (0); } + +/* + * fd.io coding-style-patch-verification: ON + * + * Local Variables: + * eval: (c-set-style "gnu") + * End: + */ |